Core Molding Technologies
CMT
#9023
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$0.20 B
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$23.47
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0.86%
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

---------------------------

FORM 10-K
(Mark One)

[X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934
FOR THE FISCAL YEAR ENDED DECEMBER 31, 1997

OR

[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934
FOR THE TRANSITION PERIOD FROM ________________ TO ________________

COMMISSION FILE NUMBER 001-12505

CORE MATERIALS CORPORATION
(EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

DELAWARE
(STATE OR OTHER JURISDICTION OF
INCORPORATION OR ORGANIZATION)

31-1481870
(I.R.S. EMPLOYER
IDENTIFICATION NO.)

800 MANOR PARK DRIVE,
P.O. BOX 28183
COLUMBUS, OHIO
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)

43228 -0183
(ZIP CODE)

Registrant's telephone number, including area code: (614) 870-5000

Securities registered pursuant to Section 12(b) of the Act:

TITLE OF EACH CLASS
Common Stock, par value $.01
NAME OF EACH EXCHANGE ON WHICH REGISTERED
American Stock Exchange, Inc.

Securities registered pursuant to Section 12(g) of the Act:

None
(TITLE OF CLASS)

Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes X No.

Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [ X ]

As of March 19, 1998, 9,612,580 shares of Core Materials Corporation common
stock were outstanding, and the aggregate market value of the voting and
non-voting common equity held by non-affiliates was $57,074,694.

DOCUMENTS INCORPORATED BY REFERENCE

1. Portions of Registrant's 1998 definitive Proxy Statement to be filed with the
Securities and Exchange Commission no later than 120 days after the end of
the registrant's fiscal year are incorporated herein by reference in PART III
of this Form 10-K.
2

PART I

ITEM 1. BUSINESS.

On October 8, 1996, RYMAC Mortgage Investment Corporation ("RYMAC")
incorporated Core Materials Corporation ("Core Materials" or the "Company") as a
wholly-owned subsidiary under the laws of the State of Delaware. RYMAC
subsequently merged with and into Core Materials on December 31, 1996. The
discussion in Part I, Item 1 of this Form 10-K provides an overview of the
historical business of RYMAC, RYMAC's decision to incorporate Core Materials,
and the current business of Core Materials as the surviving corporation of the
merger with RYMAC.

HISTORICAL BUSINESS OF RYMAC AND INCORPORATION OF CORE MATERIALS

RYMAC was incorporated in the State of Maryland on July 1, 1988. From 1988
until 1994, RYMAC was primarily engaged in making investments in mortgage
derivative securities and, to a lesser extent, mortgage related investments, all
of which were secured by single-family residential mortgage loans. RYMAC also
generated revenues from other sources, such as interest earnings on certain
investments and sales of certain investments.

Earnings difficulties and an altered mortgage securities market that
emerged between 1992 and 1994 caused RYMAC's Board of Directors in mid-1994 to
determine that it would not pursue its historical line of business and would
investigate alternative opportunities to maximize stockholder value.(1) In this
regard, RYMAC's Board of Directors focused its efforts on finding and evaluating
acquisition candidates.

On September 12, 1996, RYMAC entered into an Asset Purchase Agreement (the
"Asset Purchase Agreement") with Navistar International Transportation Corp.
("Navistar"), a manufacturer of medium- and heavy-duty trucks. The Asset
Purchase Agreement provided for the acquisition of Navistar's Columbus Plastics
operating unit. Columbus Plastics produced fiberglass and plastic component
parts for Navistar's medium- and heavy-duty trucks, and for other third party
customers, primarily Yamaha Motor Manufacturing Corporation ("Yamaha").

The Asset Purchase Agreement conditioned Navistar's obligation to sell
Columbus Plastics on the reincorporation of RYMAC in the State of Delaware. In
order to effect the reincorporation, RYMAC incorporated Core Materials as a
wholly-owned subsidiary, under the laws of the State of Delaware, on October 8,
1996. RYMAC subsequently merged with and into Core Materials on December 31,
1996. Core Materials was the surviving corporation in the merger with each
outstanding share of RYMAC common stock being converted into the right to
receive one share of Core Materials' common stock.

Immediately following the merger on December 31, 1996, Core Materials
acquired substantially all of the assets and liabilities of Columbus Plastics,
pursuant to the terms of the Asset Purchase Agreement. As consideration,
Navistar received a secured note (the "Secured Note") in an original principal
amount of $25,504,000 subject to adjustment. Navistar also received 4,264,000
shares of newly issued common stock of Core Materials).(2) Following the
acquisition, Core Materials assumed operation of the business previously
conducted by Columbus Plastics.

- ---------------

(1) RYMAC had maintained a portfolio of assets from its historical business,
selectively selling assets to generate liquidity as market conditions were
appropriate. At the acquisition, Core Materials maintained ownership of one
mortgage-backed security originally purchased by RYMAC.

(2)The principal amount of the Secured Note and the number of shares of common
stock received by Navistar were subject to adjustment pursuant to the terms
of the Asset Purchase Agreement. Effective December 31, 1996, the amount of
the Secured Note was increased to $29,514,000 in order to reflect an increase
in the "net tangible assets" of Columbus Plastics as of the December 31, 1996
acquisition date. In 1997, as a result of a review of the closing balance
sheet and all purchase price adjustments, the Secured Note amount was reduced
by $1,629,000 to reflect an amendment to the closing balance as of the
acquisition date. In addition, Navistar will receive future consideration in
the form of an increase in the principal amount of the Secured Note if Core
Materials achieves earnings results above specified levels during the period
1997 through 1999. Should there be additional future consideration, it will
be accounted for by increasing the amount of the Secured Note, and by
reducing the amount of Core Materials' retained earnings. Based on Core
Materials' earnings for the year ended December 31, 1997, the Secured Note
was increased by $2,937,000. See Notes 4, 7 and 12 of the "Notes to Financial
Statements" in Part II, Item 8 of this Form 10-K.
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3

Based upon the terms of the acquisition, the transaction for financial
reporting and accounting purposes has been accounted for as a reverse
acquisition whereby Columbus Plastics is deemed to have acquired Core Materials.
Core Materials, however, is the continuing legal entity and registrant for both
Securities and Exchange Commission filing purposes and income tax reporting
purposes. Consistent with reverse acquisition accounting treatment Core
Materials has carried forward the historical basis of the acquired assets and
assumed liabilities of Columbus Plastics and has revalued the basis of Columbus
Plastics' net assets to fair value at December 31, 1996.

BUSINESS OF CORE MATERIALS

Certain statements under this caption of this Annual Report on Form 10-K
constitute "forward-looking statements" which involve certain risks and
uncertainties. Core Materials' actual results may differ significantly from
those discussed in the forward-looking statements. Factors that may cause such a
difference include, but are not limited to: business conditions in the plastics,
transportation, recreation and consumer products industries, the general
economy, competitive factors, the dependence on two major customers, new
technologies, the year 2000 systems issue, regulatory requirements, labor
relations, the loss or inability to attract key personnel, construction delays,
the availability of capital and management's decisions to pursue new products or
businesses which involve additional cost risks or capital expenditures.

Core Materials operates principally in one business segment, the production
of high quality compression Sheet Molding Composite ("SMC") fiberglass
reinforced plastic products. SMC plastics are part of a larger family of
materials collectively known as "reinforced plastics." Reinforced plastics are
combinations of resins and reinforcing fibers formed through high or low
pressure fabrication techniques.

Reinforced plastics compete largely against metals and have the strength to
function well during prolonged use. Management believes that reinforced plastic
components offer many advantages over metals, including:

- heat resistance

- corrosion resistance

- lighter weight

- lower cost

- greater flexibility in product design

- part consolidation for multiple piece assemblies

- lower initial tooling costs for lower volume applications

- high strength-to-weight ratio

- dent-resistance in comparison to steel or aluminum.

The largest markets for reinforced plastics are transportation (automotive
and truck), recreational vehicles, commercial products and industrial
applications. The Company's two major existing customers are Navistar and
Yamaha, which are supplied proprietary SMC products for medium- and heavy-duty
trucks and personal watercraft, respectively. In general, product growth and
diversification is achieved in several different ways: (1) resourcing of
existing SMC product from another supplier by an original equipment manufacturer
("OEM"); (2) obtaining new SMC products through a selection process in which an
OEM solicits bids; and (3) successful marketing of SMC products for previously
non-SMC applications. The Company's efforts are currently directed towards all
three areas.

MAJOR COMPETITORS

Core Materials believes that it is one of the three largest compounders and
molders of SMC product in the United States. The Company faces competition from
a number of other molders including, most significantly, Cambridge Industries,
Inc., Budd Plastics Division, Molded Fiber Glass Companies, and Applied Molded
Products. The Company believes that recent consolidation within the SMC industry
has better positioned the Company to compete based primarily on manufacturing
capability, product quality, cost and delivery. However,

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the industry remains highly competitive and some of the Company's competitors
have greater financial resources, research and development facilities and
manufacturing and marketing capabilities.

MAJOR CUSTOMERS

Core Materials currently has two major customers, Navistar and Yamaha. The
loss of a significant portion of sales to Navistar or Yamaha would have a
material adverse effect on the business of Core Materials.

RELATIONSHIP WITH NAVISTAR

As a result of its acquisition of Columbus Plastics, Core Materials assumed
the long-standing relationship between Columbus Plastics and Navistar's truck
manufacturing operations. As a condition to the acquisition, Navistar and Core
Materials entered into a Comprehensive Supply Agreement, pursuant to which Core
Materials became the primary supplier of Navistar's original equipment and
service requirements for fiberglass reinforced parts, using the SMC process.

Navistar manufactures and markets medium- and heavy-duty trucks, including
school buses, mid-range diesel engines and service parts in North America and in
certain export markets. Navistar delivered 104,400 class 5 through 8 trucks,
including school buses, in the United States and Canada during its fiscal 1997,
a 9% increase from the 95,200 units delivered in 1996. Navistar's combined share
of the class 5 through 8 truck market was 28.6% in 1997 and 27.5% in 1996.
Navistar has been the leader in combined market share for class 5 through 8
trucks, including school buses, in the United States and Canada in each of the
last 17 years based on data obtained from the American Automobile Manufacturer's
Association, the United States Motor Vehicle Manufacturer's Association and R.L.
Polk & Company.

Core Materials makes products for Navistar's Chatham (Canada) assembly
plant and its Springfield, Ohio assembly and body plants. Core Materials also
plans to make products for a new Navistar facility located in Mexico which is
scheduled to open in 1998. Core Materials works closely on new product
development with Navistar's engineering and research personnel at Navistar's
Fort Wayne, Indiana, Technical Center. Some of the products sold to Navistar
include hoods, air deflectors, air fairings, fenders, splash panels, engine
covers and other components.

The North American truck market in which Navistar competes is highly
competitive and the demand for trucks is subject to considerable volatility as
it moves in response to cycles in the overall business environment and is
particularly sensitive to the industrial sector, which generates a significant
portion of the freight tonnage hauled. Truck demand also depends on general
economic conditions, among other factors. Sales to Navistar amounted to
approximately 77% for the year ended December 31, 1997.

Core Materials also received support from Navistar through December 31,
1997, in the form of accounting, payroll, and human resources management
functions under a Transitional Services Agreement with Navistar dated December
31, 1996. See Note 14 of "Notes to Financial Statements" in Part II, Item 8 of
this Form 10-K.

RELATIONSHIP WITH YAMAHA

Core Materials also has assumed the long-standing relationship between
Columbus Plastics and Yamaha. Core Materials supplies a significant amount of
the SMC products for Yamaha's personal watercraft.

The addition of Yamaha's personal watercraft component business in 1990
represented Columbus Plastics' first major outside business undertaking.
Products produced for Yamaha include decks, hulls, engine hatches, bulk heads,
and reinforcements. Core Materials (and previously, Columbus Plastics) has
worked closely with Yamaha over the years to improve the surface quality of
Yamaha products and to identify new process control techniques and improved
materials.

The diversification into a market area, other than transportation, allows
Core Materials to offset production gaps that would occur during periods of
lower demand for medium- and heavy-duty trucks. Demand for products from Yamaha
is related to the level of general economic activity and specifically to the
cyclical and seasonal nature of the personal watercraft industry among other
factors.

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5

Sales to Yamaha amounted to approximately 21% for the year ended December
31, 1997.

OTHER CUSTOMERS

Core Materials also provides limited products to customers other than
Navistar and Yamaha. In addition, Core Materials sells SMC material directly to
third parties, primarily other SMC molders.

Currently, Core Materials is focusing significant effort on the development
of additional product markets and new customer relationships to facilitate
further growth.

EXPORT SALES

Core Materials provides products to Navistar's manufacturing and service
locations in Canada. Export sales, to Canada, approximated 20%, 9% and 3% of
total sales for the twelve month periods ended December 31, 1997, December 31,
1996 and October 31, 1995, respectively.

PRODUCTS

SMC

Core Materials incorporates a sophisticated computer program that assists
in the compounding of various complex SMC formulations tailored to customer
needs. The system provides for the following:

- Control information during various production processes; and

- Data for statistical batch controls

Core Materials has the capacity to manufacture approximately 45 million
pounds of SMC sheet material annually. Core Materials reached this production
capacity, in part, through the installation of an additional SMC compounding
machine, which was brought on line in early 1997. Production of SMC for the
twelve month periods ended December 31, 1997, December 31, 1996, and October 31,
1995 was as follows:

<TABLE>
<CAPTION>
SMC POUNDS
PRODUCED
YEAR (MILLIONS)
---- ----------
<S> <C>
1997 (December 31)............................. 28
1996 (December 31)............................. 27
1995 (October 31).............................. 31
</TABLE>

MOLDING

Core Materials currently owns or leases 17 presses in its Columbus, Ohio
plant ranging in size from 500 to 4500 tons. In the first quarter of 1998, Core
Materials opened a second plant located in Gaffney, South Carolina, which
includes 6 presses ranging in size from 500 to 1500 tons. The Company also has
ordered a 3000 ton press to be installed in the Gaffney, South Carolina plant
later in 1998.

Large platen, high tonnage presses (greater than 2000 tons) provide the
ability to compression mold very large, notably configured SMC parts. Core
Materials believes that it possesses in excess of 40% of the large platen, high
tonnage molding capacity in the industry.

To enhance the surface quality and paint finish of products, Core Materials
uses both in-mold coating and vacuum molding processes. In-mold coating is a
manufacturing process performed by injecting a liquid over the molded part
surface and then applying pressure at elevated temperatures during an extended
molding cycle. The liquid coating serves to fill and/or bridge surface porosity
as well as provide a barrier against solvent penetration during subsequent
top-coating operations. Likewise, vacuum molding is the removal of air during
the molding cycle for the purpose of reducing the amount of surface porosity.
Core Materials believes that it is among the industry leaders in in-mold coating
and vacuum molding applications, based on the size and complexity of parts
molded.

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ASSEMBLY, MACHINING AND PAINT

Core Materials has demonstrated manufacturing flexibility that accepts a
range of very low volume, hand assembly and machining work to high volume,
highly automated assembly and machining systems. Robotics are used extensively
for material handling, machining and adhesive applications. In addition to
conventional machining methods, water-jet cutting technology is also used where
appropriate. Two automated guided vehicles are used to transfer high volume
product from the assembly area to the prime paint operation. The prime paint
operation uses an overhead conveyor to transfer product through two paint booths
and bake ovens.

RAW MATERIALS

The principal raw materials used in the compounding of SMC are polyester
resins, fiberglass rovings and filler. Other significant raw materials include
adhesives for assembly of molded components and in-mold coating and prime paint
for preparation of cosmetic surfaces. The use of single-source, long-term supply
contracts assures the Company of competitive pricing and an adequate supply of
all of these raw materials. Additionally, each raw material has several other
supplier alternatives.

BACKLOG

Core Materials relies on production schedules provided by Navistar and
Yamaha to plan and implement production. These schedules are provided on a
monthly basis and are considered firm for the current period. Navistar and
Yamaha can update these schedules daily for changes in demand that allows them
to run their inventories on a "just-in-time" basis. The ordered backlog was
approximately $6.9 million and $4.5 million at December 31, 1997 and December
31, 1996, respectively all of which is expected to be shipped within a year.

CAPACITY CONSTRAINTS

Core Materials and Columbus Plastics have been required to work, from time
to time, a seven day/three shift schedule to meet Navistar and Yamaha production
requirements. The addition of the second plant in Gaffney, South Carolina will
provide additional capacity to support the production requirements of current
customers and opportunity for growth.

CAPITAL EXPENDITURES AND RESEARCH AND DEVELOPMENT

Capital expenditures totaled approximately $10.3 million, $5.1 million and
$7.3 million for the twelve month periods ended December 31, 1997, December 31,
1996 and October 31, 1995, respectively. Capital expenditures consist of presses
and other equipment to manufacture parts as well as laboratory equipment,
storage equipment, computers and office furniture and fixtures. The 1997 amounts
also include the acquisition and construction of the Gaffney, South Carolina
plant.

Product development is a continuous process at Core Materials. Research and
development activities focus on developing new SMC formulations and improving
existing products and manufacturing processes.

Core Materials does not maintain a separate research and development
facility but uses its production equipment (compounding machines, molding
presses, and primer system), as necessary, to support these efforts and
cooperates with its customers and its suppliers in its research and development
efforts. Likewise, manpower to direct and advance research and development is
integrated with the existing manufacturing, engineering, production, and quality
organizations. Management of Core Materials has estimated that internal costs
related to research and development activities approximate $200,000 per year.

ENVIRONMENTAL COMPLIANCE

Core Materials' manufacturing operations are subject to federal, state and
local environmental laws and regulations which impose limitations on the
discharge of pollutants into the air and water and establish standards for the
treatment, storage and disposal of hazardous waste. The Company's policy is to
conduct its business with due regard for the preservation and protection of the
environment. Core Materials' environmental waste management involves the daily
auditing of all satellite hazardous waste accumulation points, weekly audits of
all

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hazardous waste activities and biennial audits of every authorized treatment,
storage and disposal facility. The Company's environmental staff also trains
each new employee on waste management and other environmental issues as part of
an initial orientation process, and annually thereafter.

Core Materials has submitted the information necessary for the granting of
a Title V permit, as required under the Clean Air Act. In 1989, Columbus
Plastics installed a Regenerative Thermal Oxidizer ("Oxidizer"). The purpose of
the Oxidizer system is to destroy volatile organic compounds from the coating
and SMC operations. The Oxidizer system allows Core Materials to comply with the
Ohio E.P.A. and Title V permit conditions by consistently achieving about 95%
destruction efficiency. Core Materials believes that it is in compliance with
the Resource Conservation and Recovery Act of 1976 ("RCRA") and the
Comprehensive Environmental Response, Compensation, and Liability Act of 1980
("CERCLA"). Compliance with these environmental laws and regulations has not
had, nor is it currently expected to have, a material effect on the Company's
operations, competitive position or capital expenditures through fiscal year
1998. The amount of capital expenditures currently expected to be spent on
environmental compliance is not significant.

EMPLOYEES

As of December 31, 1997, Core Materials employed a total of 433 employees,
344 of whom are covered by a collective bargaining agreement with the
International Association of Machinists and Aerospace Workers ("IAM"). The
Company's original contract with the IAM was scheduled to expire in August,
1998. In December, 1997, early labor contract negotiations began between
management and union representatives. On January 21, 1998, Core Materials
announced that a new three-year, seven-month labor agreement with the IAM had
been reached which extends the contract to August 1, 2001.

PATENTS, TRADE NAMES AND TRADEMARKS

Core Materials will evaluate, apply for and maintain patents, trade names
and trademarks where it believes that such patents, trade names and trademarks
are reasonably required to protect its rights in its products. Core Materials
does not believe that any single patent, trade name or trademark or related
group of such rights is materially important to its business or its ability to
compete.

SEASONALITY

The Company's business is affected annually by the production schedules of
Navistar and Yamaha. Navistar and Yamaha typically shut down their operations on
an annual basis for a period of several weeks during the Company's third
quarter. As a result, demand by Navistar and Yamaha for the Company's SMC
products drops significantly during the third quarter. Similarly, demand for
Navistar's medium- and heavy-duty trucks and Yamaha's personal watercraft
products fluctuates on a cyclical and seasonal basis, causing a corresponding
fluctuation for demand of the Company's SMC products.

YEAR 2000 MATTERS

Issues related to the year 2000 systems issues are addressed in Part II,
Item 7, "Management Discussion and Analysis of Financial Condition and Results
of Operations" included herein.

ITEM 2. PROPERTIES.

The important physical properties of Core Materials consist of two plants
that are situated, respectively, in Columbus, Ohio and in Gaffney, South
Carolina. The Company believes that, through productive use, these facilities
have adequate production capacity to meet current production volume. The
approximate capacity utilization for the molding of production products in the
Columbus, Ohio plant was 108%, 80% and 122% in December, 1997, December, 1996
and October, 1995. The approximate capacity utilization in March, 1998 was 78%,
as a result of the addition of the Gaffney, South Carolina plant. Capacity
utilization is measured on the basis of a six day, three-shifts per day
operation

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8

The Columbus, Ohio plant is located at 800 Manor Park Drive on
approximately 28.2 acres of land. The approximate 321,814 square feet of
available floor space at the Columbus, Ohio plant is comprised of the following:

<TABLE>
<CAPTION>
APPROXIMATE
SQUARE FEET
-----------
<S> <C>
Manufacturing/Warehouse................................ 307,447
Office................................................. 14,367
-------
321,814
</TABLE>

Core Materials acquired the property at 800 Manor Park Drive as a result of
the Asset Purchase Agreement with Navistar.

The Gaffney, South Carolina plant is located at 24 Commerce Drive, Meadow
Creek Industrial Park on approximately 20.7 acres of land. The approximate
110,900 square feet of available floor space at the Gaffney, South Carolina
plant is comprised of the following:

<TABLE>
<CAPTION>
APPROXIMATE
SQUARE FEET
-----------
<S> <C>
Manufacturing/Warehouse................................ 105,700
Office................................................. 5,200
-------
110,900
</TABLE>

The plant, which can be expanded in the future, began molding and assembly
operations in early 1998.

Both the Columbus, Ohio and Gaffney, South Carolina properties are subject
to liens and securities interests as a result of the properties being pledged as
collateral for the Company's debt as described in Note 7 of the "Notes to
Financial Statements" in Part II, Item 8 of this Form 10-K.

ITEM 3. LEGAL PROCEEDINGS.

Core Materials is not currently a party, nor is any of its property
subject, to any material pending legal proceedings, other than ordinary, routine
litigation incidental to the business, nor are any such proceedings known by the
Company to be contemplated by governmental authorities.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

The Company submitted no matters to a vote of its security holders during
the fourth quarter of the Company's fiscal year ended December 31, 1997.

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PART II

ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS.

The Company's common stock is traded on the American Stock Exchange under
the symbol "CME" and began trading on January 2, 1997. The common stock of the
Company's former parent, RYMAC, was traded on the American Stock Exchange under
the symbol "RM" until December 31, 1996.

The table below sets forth the high and low sale prices of Core Materials
and RYMAC common stock for each full quarterly period within the two most recent
fiscal years for which such stock was traded, as reported on the American Stock
Exchange Composite Tape. Following the acquisition and merger, Core Materials
assumed the business previously conducted by Columbus Plastics, rather than the
business previously conducted by RYMAC. The historical prices for RYMAC common
stock, therefore, are not indicative of Core Materials' current or potential
future performance.

<TABLE>
<CAPTION>
HIGH LOW
---- ---
<S> <C> <C> <C>
CORE MATERIALS CORPORATION
First Quarter.............................. 1997 4 1/8 2 1/4
Second Quarter............................. 1997 3 3/4 2 1/2
Third Quarter.............................. 1997 4 1/8 3 1/8
Fourth Quarter............................. 1997 5 3 1/2
RYMAC MORTGAGE INVESTMENT CORPORATION
First Quarter.............................. 1996 1 7/16 1
Second Quarter............................. 1996 2 7/8 1 1/8
Third Quarter.............................. 1996 2 5/8 1 1/2
Fourth Quarter............................. 1996 2 1/2 1 7/8
</TABLE>

The Company's common stock was held by 745 holders of record on March 19,
1998.

Neither RYMAC nor Core Materials made any payments of cash dividends during
the fiscal years ended December 31, 1996 and December 31, 1997. Core Materials
currently expects that its earnings will be retained to finance the growth and
development of its business and does not anticipate paying dividends on its
common stock in the foreseeable future.

Moreover, Core Materials is restricted by covenants contained in the
Secured Note due Navistar. Pursuant to the terms of the Secured Note, Core
Materials has agreed that, so long as any amount is owing to Navistar, it will
not, and will not permit any of its subsidiaries to, directly or indirectly,
declare or pay any dividend (other than dividends payable solely in common stock
or preferred stock of Core Materials and dividends payable by any subsidiary of
Core Materials to Core Materials, or any other subsidiary of Core Materials) on,
or make any payment on account of, or set apart assets for a sinking or other
analogous fund for, the purchase, redemption, defeasance, retirement or other
acquisition of, any shares of any class of capital stock of Core Materials or
any warrants or options to purchase any such capital stock, whether now or
hereafter outstanding, or make any other distribution in respect thereof, either
directly or indirectly, whether in cash or property or in obligations of Core
Materials or any subsidiary.

UNREGISTERED SECURITIES

In 1997, Core Materials issued, in total, 41,000 shares of common stock,
par value $.01 per share, to 410 employees (which constituted all of its
employees with the exception of certain executive employees.(3)) The Company
received no consideration for the shares. The shares were issued as an incentive
for its employees to remain with the Company and are subject to forfeiture to
the Company if an employee leaves prior to December 31, 1998. During this
period, the shares may not be transferred.

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(3) Specifically, Richard R. Conte (Director and former employee of the
Company), Kenneth M. Schmell (General Manager and Acting Chief Executive
Officer), and Gerald L. Voirol (Controller and Assistant Secretary) did not
receive any of the common shares issued on February 19. In addition, at
least one employee decided not to accept the shares.
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ITEM 6. SELECTED FINANCIAL DATA.

The following selected financial data are derived from the audited
financial statements of Core Materials and Columbus Plastics. The capital
structure of Core Materials differs significantly from the capital structure of
Columbus Plastics prior to its acquisition by RYMAC. The information set forth
below should be read in conjunction with "Management's Discussion and Analysis
of Financial Condition and Results of Operations" the financial statements and
related notes included elsewhere herein including, the unaudited combined pro
forma financial information.

<TABLE>
<CAPTION>
TWO MONTHS
YEAR ENDED YEAR ENDED ENDED YEAR ENDED OCTOBER 31,
DECEMBER 31, DECEMBER 31, DECEMBER 31, ----------------------------
(IN THOUSANDS, EXCEPT PER SHARE DATA) 1997 1996(1) 1995(1) 1995(1) 1994(1) 1993(1)
- ------------------------------------- ------------ ------------ ------------ -------- ------- -------
<S> <C> <C> <C> <C> <C> <C>
Net................................. $64,940 $52,467 $ 8,855 $59,505 $44,191 $39,767
sales Gross margin.................. 14,061 5,439 1,329 10,366 8,071 3,907
Income before interest and taxes.... 6,654 547 544 4,790 2,466 67
Net income.......................... 2,723 N/A N/A N/A N/A N/A
Net income per common share:
Basic............................. .29 N/A N/A N/A N/A N/A
Diluted........................... .28 N/A N/A N/A N/A N/A
Total assets........................ 57,540 47,729(2) 33,305 32,591 20,281 N/A
Long term debt...................... 18,822 27,885(2) N/A N/A N/A N/A
Navistar's equity................... N/A N/A 24,206 20,140 14,489 N/A
Stockholders' equity................ 16,095 16,176 N/A N/A N/A N/A
</TABLE>

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(1) Prior to January 1, 1997, Core Materials provided Navistar's truck assembly
operations with all of its sheet molding composite plastic component
requirements at standard cost; production for Navistar accounted for greater
than 60% of Core Materials' output in all periods represented. The remainder
was sold to unrelated third party customers at negotiated prices. Net Income
and Net Income Per Share information has been omitted because Core Materials
was not a separate stand alone division or subsidiary of Navistar and
generally was not accounted for separately prior to the Acquisition. In
addition, Navistar's systems and procedures do not provide sufficient
information to develop a reasonable cost allocation of income taxes,
corporate debt and interest expense.
(2) The December 31, 1996 the Secured Note to Navistar was reduced by $1,629,000
to reflect an amendment to the closing balance as of the acquisition date.
See notes 7 and 12 of the "Notes to Financial Statements".

ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS OF CORE MATERIALS.

Certain statements under this caption of this Annual Report on Form 10-K
constitute "forward-looking statements" which involve certain risks and
uncertainties. Core Materials' actual results may differ significantly from
those discussed in the forward-looking statements. Factors that may cause such a
difference include, but are not limited to: business conditions in the plastics,
transportation, recreation and consumer products industries, the general
economy, competitive factors, the dependence on two major customers, new
technologies, the year 2000 systems issue, regulatory requirements, labor
relations, the loss or inability to attract key personnel, construction delays,
the availability of capital and management's decisions to pursue new products or
businesses which involve additional cost risks or capital expenditures.

OVERVIEW

On December 31, 1996, Core Materials acquired all of the assets and assumed
certain liabilities of Columbus Plastics, a wholly owned operating unit of
Navistar's truck manufacturing division since its formation in late 1980. Based
on the terms of the acquisition, the transaction for financial reporting and
accounting purposes has been accounted for as a reverse acquisition whereby
Columbus Plastics is deemed to have acquired Core Materials. However, Core
Materials is the continuing legal entity. Accordingly, any references to the
operating results of Core Materials for 1996 and 1995 refer to the historical
operations of Columbus Plastics.

Core Materials manufactures high quality compression SMC fiberglass
reinforced parts. Core Materials has two major customers, Navistar and Yamaha.
The demand for Core Materials' products is affected by the volume

11
11

of purchases from these two customers, whose orders are primarily affected by
economic conditions in the United States and Canada. Core Materials'
manufacturing operations have a significant fixed cost component. Accordingly,
during periods of changing demands, the profitability of Core Materials'
operations will change proportionately more than revenues from operations.

Pursuant to the Asset Purchase Agreement, Navistar and Core Materials
entered into a Comprehensive Supply Agreement with an initial term of five
years. Under the terms of the Comprehensive Supply Agreement, Navistar agreed to
purchase from Core Materials, and Core Materials agreed to sell to Navistar at
negotiated prices, which approximate fair value, all of Navistar's original
equipment and service requirements for fiberglass reinforced parts using the SMC
process for components then being manufactured by Core Materials and detailed in
the Comprehensive Supply Agreement. All sales and gross margin information for
1997 reflects the results of the Comprehensive Supply Agreement.

Prior to January 1, 1997, Core Materials had not been a stand alone
operating entity. As such, Navistar had provided substantial management support
in the form of treasury, legal, tax, information systems and other similar
corporate support functions. Corporate general and administrative expenses have
not been previously allocated to Core Materials. For purposes of preparing the
income statement of Core Materials for calendar year 1996, the two months ended
December 31, 1995, and fiscal year 1995 included in this Form 10-K, these
corporate costs have been allocated using a method management believes to be
reasonable and reflective of those costs had they been incurred on a stand alone
basis.

Net sales for 1996 and the 1995 periods do not reflect the additional
revenue that would have been generated had the Comprehensive Supply Agreement
been in effect at that time. Prior to the Comprehensive Supply Agreement, all
sales to Navistar facilities were accounted for at Core Materials' ("Columbus
Plastics Operations") standard costs. In addition, Core Materials did not incur
certain expenses related to being a stand alone publicly traded entity, such as
executive salary costs and legal and accounting fees. Finally, the results for
1996 and the 1995 periods do not reflect investment income or expenses for
interest or income taxes. Thus, the results of 1996 and the 1995 periods are not
readily comparable to the results of 1997.

In order to make this comparison more meaningful in the discussion which
follows, pro forma financials have been prepared for 1996 and the year ended
October 31, 1995 (See Note 5 in the "Notes to Financial Statements" for further
information). In the discussion which follows, all references to and comparisons
with the results of 1996 and 1995 reflect the historical Columbus Plastics
financials. Any dollars and/or percentages in parentheses reflect references to
and comparisons with 1996 and 1995 pro forma financial information.

RESULTS OF OPERATIONS

1997 COMPARED WITH 1996

Net sales for 1997 totaled $64,940,000, up 24% (15%) from the $52,467,000
($56,590,000) reported for 1996. Sales to Navistar increased 59% (40%) to
$50,011,000 from $31,546,000 ($35,669,000) in 1996. The increase in sales to
Navistar was primarily the result of a general increase in volume of sales and
sales of certain heavy truck components which Core Materials began producing in
June 1996. Sales to Yamaha decreased in 1997 by 32% to $13,416,000, compared
with $19,759,000 in 1996. The decrease in sales to Yamaha is primarily due to
Yamaha's production slowdown as a result of the maturing of the personal
watercraft industry.

"Other" sales increased 30% to $1,514,000 from $1,161,000 in 1996. These
additional sales were primarily the result of increased sales of sheet molding
composite to an SMC molder.

Gross margin was 22% of sales in 1997 compared with 10% (17%) for 1996. The
increased gross margin as a percent of sales, 22% versus 10%, is primarily due
to the markup (per the Comprehensive Supply Agreement) on sales to Navistar. The
1997 gross margin as a percent of sales increased over the 1996 pro forma
adjusted percentage due to increased sales volumes and due to 1996's cost of
sales including higher than normal repair and maintenance expenses and
unfavorable inventory adjustments. Additionally, Core Materials has experienced
increased control of its material related costs.

12
12

Selling, general and administrative expenses ("SG&A") totaled $7,465,000 in
1997, increasing from $5,242,000 ($6,106,000) in 1996. The increase over the
1996 amounts is primarily due to the Company incurring expenses related to being
a stand alone publicly traded entity, increased depreciation expense and
increased employee related expenses.

"Other" income totaled $58,000 in 1997 decreasing from $350,000 in 1996.
The decrease from the 1996 actual amounts is primarily due to income generated
in 1996 from the close-out of a special tooling project for one customer.

Interest income for 1997 totaled $234,000 and is primarily attributable to
interest on Core Materials' mortgage-backed security investment. Interest
expense for 1997 totaled $2,232,000, primarily reflecting interest on the
Secured Note held by Navistar; this expense was offset by $180,000 of
capitalized interest expense relating to property, plant and equipment under
construction. The Company had no interest income or interest expense in 1996
since all investing and financing was handled at Navistar's corporate offices.

Income taxes for 1997 were estimated to be approximately 41.5% of total
earnings before taxes. Actual tax payments will be substantially lower than the
recorded expenses as Core Materials has substantial federal tax loss
carryforwards. These loss carryforwards were recorded as a deferred tax asset,
partially offset by a valuation allowance at December 31, 1996 as a part of the
purchase accounting adjustments. As the tax loss carryforwards are utilized to
offset federal income tax payments, Core Materials reduces the deferred tax
asset as opposed to recording a reduction in income tax expense. Actual cash
payments for 1997 are estimated to be approximately $478,000 which reflects
federal alternative minimum, state and local taxes.

Net income for 1997 was $2,723,000 or $.28 per diluted share, an increase
of ($1,433,000) or (111%) over the 1996 pro forma net income of ($1,290,000), or
($.13) per diluted share. The 1997 increase over 1996's pro forma amounts was
primarily the result of increased sales and improved margins as delineated
above. Core Materials has approximately $29,000,000 of operating tax loss
carryforwards that do not begin to expire until the year 2007. If the benefit of
the Company's operating tax loss carryforwards were recorded as a reduction in
income tax expense, which is reflective of the actual cash treatment, net income
for the year would have increased by $1,455,000, or $.15 per diluted share, to a
total of $.43 per diluted share. The comparable 1996 pro forma net income would
have increased by ($738,000), or ($.08) per diluted share, to a total of ($.21)
income per diluted share.

1996 COMPARED WITH 1995

Net sales for calendar 1996, totaled $52,467,000 ($56,590,000) down 12%
(13%) from the $59,505,000 ($65,371,000) reported for fiscal 1995. Sales to
Navistar decreased 16% (18%) to $31,546,000 ($35,669,000) from $37,777,000
($43,643,000) in 1995. The decrease in sales to Navistar was the direct result
of a decrease in sales of Navistar trucks resulting from a decline in demand for
trucks in the United States and Canada. Sales to Yamaha decreased in 1996 by 2%
to $19,759,000 compared with $20,222,000 in 1995. The decrease was the result of
a slight decrease in demand for Yamaha's watercraft products.

"Other" sales decreased 23% to $1,161,000 from $1,506,000 in 1995. This
reduction in sales was primarily the result of short-term production of certain
consumer products in 1995.

Gross margin was 10% (17%) of sales for 1996 compared with 17% (25%) for
1995. The decrease in gross margin as a percent of sales, 17% to 10%, is
primarily due to decreased sales volume. In addition, 1996's cost of sales
included increased depreciation expense, start up costs related to the tooling
for a new Yamaha model, increased labor costs resulting from the three year
labor agreement with hourly employees signed in August, 1995 and increased
repair and maintenance costs relating to projects that had been deferred during
1995 due to the record production volumes experienced in that year.

SG&A totaled $5,242,000 ($6,106,000) in 1996 decreasing from $5,521,000
($6,385,000) in 1995. The decrease from the 1995 actual amount is primarily due
to expenses incurred during a fifteen day labor strike in 1995.

13
13

"Other" income totaled $350,000 increasing from an expense of $55,000 in
1995. The 1996 income is primarily due to one time income generated from the
close-out of a special tooling project for one customer. The 1995 expense
reflects a loss on the disposal of assets.

Pro forma net income for 1996 was ($1,290,000) or ($.13) per diluted share,
a decrease of ($3,298,000) or (72%) over the pro forma net income of
($4,588,000), or ($.48) per diluted share for 1995. The 1996 increase over
1995's amounts was primarily the result of decreased sales and reduced margins
as discussed above.

LIQUIDITY AND CAPITAL RESOURCES

Net working capital at December 31, 1997 decreased $3,514,000 from the
working capital at December 31, 1996. The primary reason for the decrease in
working capital is the use of $3,997,000 in short-term notes to finance the
construction of the Company's new facility in Gaffney, South Carolina; see
further discussion below. Accounts receivable increased by $12,298,000 and
accounts payable increased by $7,768,000 from the December 31, 1996 amounts. The
primary causes for both the receivables and payables increase is the Asset
Purchase Agreement between Core Materials and Navistar. As of December 31, 1996,
the effective date of the purchase, there were no receivables on the books for
Navistar as a customer. Additionally, as part of the Asset Purchase Agreement,
Navistar assumed a majority of the accounts payable of Columbus Plastics that
existed on December 31, 1996. The December 31, 1997 accounts receivable includes
Navistar receivables for sales under the Comprehensive Supply Agreement. The
December 31, 1997 accounts payable includes expenditures to support normal
production and the construction of the Company's new facility in South Carolina.
Property additions of $10,341,000 primarily related to the acquisition of land,
building and machinery and equipment for the above mentioned South Carolina
facility.

Columbus Plastics' working capital and investment needs were financed by
Navistar through the intercompany Equity Investment account and through the sale
of products to Yamaha. Subsequent to the Acquisition, Core Materials has
independently funded all of its working capital and investment capital
requirements. Funds necessary to meet its working capital and investment needs
are currently being financed through the following sources: 1) the Comprehensive
Supply Agreement between Navistar and Core Materials, which requires that
Navistar obtain its SMC plastic components, as detailed in the Comprehensive
Supply Agreement, from Core Materials at negotiated prices which approximate
fair value; 2) the Company has substantial tax net operating losses ("NOLs")
that will be available to offset future taxable income of Core Materials (the
utilization of these NOLs will substantially reduce any federal income tax
liability payments); and 3) the financing facilities discussed below.

In the fourth quarter of 1997, Core Materials entered into a comprehensive
financing arrangement with a financial institution. Under this arrangement, the
financial institution committed to provide Core Materials the following credit
facilities: 1) a $7,500,000 variable rate revolving line of credit; 2) a
$12,000,000 sale leaseback arrangement on certain machinery and equipment; 3) a
$7,500,000 standby letter of credit to support the issuance of an Industrial
Revenue Bond, and 4) $5,500,000 for equipment leases.

In December 1997, Core Materials closed on the line of credit which will be
used for working capital purposes and to temporarily fund capital expenditures
related to the Company's South Carolina expansion. Also in December, the Company
entered into a sale leaseback agreement, the proceeds of which were used to pay
down the Secured Note payable to Navistar. See notes 6 and 7 of the "Notes to
Financial Statements" for further discussion.

The Industrial Revenue Bond and equipment leases will be used as permanent
financing for Core Materials' new facility and equipment in South Carolina. The
Company expects to close on these facilities in the second quarter of 1998.

At December 31, 1997, Core Materials also had a $3,000,000 line of credit
with another financial institution. The Company terminated this credit facility
in January 1998.

Management believes that internally generated funds from operations, along
with the current and future financing identified above, will be sufficient to
fund anticipated capital requirements.

14
14

INCOME TAXES

The balance sheet at December 31, 1997 and 1996 includes a deferred tax
asset of $11,625,000 and $13,080,000, respectively, net of a valuation allowance
of $6,787,000 in 1997 and 1996. The deferred tax asset is net of a valuation
allowance since it is more likely than not that a portion of the deferred tax
asset may not be realized in the future.

The deferred tax asset at December 31, 1997 primarily includes the tax
benefits associated with cumulative net operating and capital tax losses of
approximately $37.7 million, temporary differences between the book and tax
basis of Core Materials' property and equipment of approximately $9.9 million
and temporary differences relating to post-retirement and pension benefits of
$2.4 million. The valuation allowance at December 31, 1997 assumes that it is
more likely than not that approximately $11.1 million of the cumulative net
operating losses and all (approximately $8.9 million) of the cumulative capital
tax losses will not be realized before their expiration date. Realization of the
net deferred tax asset is dependent on the generation of approximately $29
million of future taxable income, of which an average of approximately $2.2
million would need to be generated annually for the next 11- year period 1998
through 2008.

Extensive analysis is performed to determine the amount of the deferred tax
asset. Such analysis is based upon the premise that Core Materials is and will
continue as a going concern and that it is more likely than not that deferred
tax benefits will be realized through the generation of future taxable income.
Management reviews all available evidence, both positive and negative, to assess
the long-term earnings potential of Core Materials using a number of
alternatives to evaluate financial results in economic cycles at various
industry volume conditions. Other factors considered are the Company's
long-standing relationship with its two largest customers -- Navistar and
Yamaha -- the Comprehensive Supply Agreement between Core Materials and
Navistar, and Navistar's 17-consecutive-year leadership in the combined market
share of Class 5 through 8 trucks. The projected availability of taxable income
to realize the tax benefits from net operating loss carryforwards and the
reversal of temporary differences before expiration of these benefits are also
considered. Management believes that, with the combination of available tax
planning strategies, the maintenance of its relationships with Yamaha and
Navistar and Navistar's maintenance of significant market share, earnings are
achievable in order to realize the net deferred tax asset of $11,625,000.

Reconciliation of the Company's income before income taxes for financial
statement purposes to United States Taxable Income for the year ended December
31, 1997 is as follows:

<TABLE>
<S> <C>
Income before income taxes.................................. $4,656,324
State income taxes.......................................... (411,800)
Temporary differences....................................... (985,298)
Other....................................................... 11,938
----------
Taxable income.............................................. $3,271,164
==========
</TABLE>

YEAR 2000 MATTERS

Core Materials has identified all significant applications that will
require modification to ensure Year 2000 compliance. Internal and external
resources are being used to make the required modifications and test Year 2000
compliance. The Company plans to complete the modifications and testing process
of all significant applications by May 1999, which is prior to any anticipated
impact on its operating systems. The total cost of the Year 2000 project is
estimated at $716,000 and is being funded through operating cash flows. Of the
total project cost, approximately $462,000 is attributable to the purchase of
new hardware and software which will be capitalized. The remaining $254,000,
which will be expensed as incurred, is not expected to have a material effect on
the results of operations. In 1997, the Company incurred approximately $402,000
of costs associated with this project of which $293,000 related to the purchase
of new hardware and software which was capitalized.

The costs of the project and the date on which Core Materials believes it
will complete the Year 2000 modifications are based on management's best
estimates, which were derived utilizing numerous assumptions of future events,
including the continued availability of certain resources, third-party
modification plans and other

15
15

factors. However, there can be no guarantee that these estimates will be
achieved and actual results could differ materially from those anticipated.
Specific factors that might cause such material differences include, but are not
limited to, the availability and cost of personnel trained in this area, the
ability to locate and correct all relevant computer codes, and similar
uncertainties.

In addition, Core Materials will communicate with others with whom it does
significant business to determine their Year 2000 compliance readiness and the
extent to which the Company is vulnerable to any third-party Year 2000 issues.
However, there can be no guarantee that the systems of other companies on which
the Company's systems rely will be timely converted, or that a failure to
convert by another company, or a conversion that is incompatible with the
Company's systems, would not have a material adverse affect on the Company.

NEW ACCOUNTING PRONOUNCEMENTS

In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130, "Reporting Comprehensive Income" (SFAS
130). SFAS 130 establishes standards for reporting and display of comprehensive
income and its components. This statement is effective for fiscal years
beginning after December 15, 1997. This standard expands or modifies disclosures
and, accordingly, will have no impact on the Company's reported financial
position, results of operations and cash flows.

In February 1998, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards No. 132, "Employers' Disclosures about
Pensions and Other Postretirement Benefits." This statement revises standards
for disclosures about pension and other postretirement benefit plans and is
effective for fiscal years beginning after December 15, 1997. This standard
expands or modifies disclosure and, accordingly, will have no impact on the
Company's reported financial position, results of operations and cash flows.

MANAGEMENT'S OUTLOOK

For 1998, management anticipates continued strength in sales to Navistar
and relatively flat sales to Yamaha. Significant focus will be placed on
expanding the customer base and filling the capacity created with the opening of
the Company's new facility in South Carolina in early 1998. Core Materials has
initiated and responded to a number of new sales opportunities. Although there
can be no assurance that these opportunities will result in new business,
management is encouraged by both the number and diversity of the opportunities.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

The disclosures required under this Part II, Item 7A are omitted pursuant
to the General Instructions to Item 305 of Regulation S-K, because this Annual
Report on Form 10-K, for the fiscal year ended December 31, 1997, does not
contain financial statements for fiscal years ended after June 15, 1998.

16
16

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

INDEPENDENT AUDITORS' REPORT

Core Materials Corporation
Columbus, Ohio

We have audited the accompanying balance sheets of Core Materials
Corporation (the "Company") as of December 31, 1997 and 1996 and the related
statement of income, stockholders' equity, and cash flow for the year ended
December 31, 1997 and the statements of revenues, direct expenses and identified
corporate expenses before interest and taxes for the year ended December 31,
1996, the two-month period ended December 31, 1995 and the year ended October
31, 1995. Our audits also included the financial statement schedule listed in
the Index for Item 14. These financial statements and the financial statement
schedule are the responsibility of the Company's management. Our responsibility
is to express an opinion on these financial statements and the financial
statement schedule based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

As explained in Note 2, the Company's historical operating results are not
necessarily indicative of those which may have resulted had it been a stand
alone company in 1996 and 1995.

In our opinion, such financial statements present fairly, in all material
respects, the financial position of Core Materials Corporation as of December
31, 1997 and 1996 and the results of its operations and its cash flow for the
year ended December 31, 1997 and its direct operations and identified corporate
expenses before interest and taxes for the year ended December 31, 1996, the
two-month period ended December 31, 1995 and the year ended October 31, 1995 in
conformity with generally accepted accounting principles. Also, in our opinion,
such financial statement schedule, when considered in relation to the basic
financial statements taken as a whole, presents fairly in all material respects
the information set forth therein.

/s/ DELOITTE & TOUCHE LLP
- ------------------------------------
DELOITTE & TOUCHE LLP

Chicago, Illinois
March 2, 1998

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17

CORE MATERIALS CORPORATION

STATEMENT OF INCOME FOR THE YEAR ENDED DECEMBER 31, 1997
AND STATEMENTS OF REVENUES, DIRECT EXPENSES AND IDENTIFIED CORPORATE EXPENSES
BEFORE INTEREST AND TAXES FOR THE YEAR ENDED DECEMBER 31, 1996,
THE TWO MONTHS ENDED DECEMBER 31, 1995 AND THE YEAR ENDED OCTOBER 31, 1995

<TABLE>
<CAPTION>
TWO MONTHS
YEAR ENDED YEAR ENDED ENDED YEAR ENDED
DECEMBER 31, DECEMBER 31, DECEMBER 31, OCTOBER 31,
1997 1996 1995 1995
------------ ------------ ------------ ------------
<S> <C> <C> <C> <C>
NET SALES:
Navistar.................................. $50,010,566 $31,546,315 $5,334,994 $37,777,164
Yamaha.................................... 13,415,548 19,759,033 3,216,025 20,221,722
Other..................................... 1,513,844 1,161,461 303,633 1,506,243
----------- ----------- ---------- -----------
Total sales....................... 64,939,958 52,466,809 8,854,652 59,505,129
----------- ----------- ---------- -----------
Cost of sales............................... 50,118,918 46,148,086 7,401,442 48,458,210
Postretirement benefits expense............. 760,410 879,487 124,358 680,857
----------- ----------- ---------- -----------
Total cost of sales............... 50,879,328 47,027,573 7,525,800 49,139,067
----------- ----------- ---------- -----------
GROSS MARGIN................................ 14,060,630 5,439,236 1,328,852 10,366,062
----------- ----------- ---------- -----------
Selling general and administrative
expense................................... 7,350,385 5,078,487 761,727 5,345,008
Postretirement benefits expense............. 114,429 163,307 26,750 176,241
----------- ----------- ---------- -----------
Total selling, general and
administrative expense.......... 7,464,814 5,241,794 788,477 5,521,249
----------- ----------- ---------- -----------
Other income (expense)...................... 58,210 349,604 3,250 (55,241)
----------- ----------- ---------- -----------
INCOME BEFORE INTEREST AND TAXES............ 6,654,026 547,046 543,625 4,789,572
Interest income............................. 233,873 N/A N/A N/A
Interest (expense).......................... (2,231,575) N/A N/A N/A
----------- ----------- ---------- -----------
INCOME BEFORE INCOME TAXES.................. 4,656,324 N/A N/A N/A
Income taxes:
Current................................... 478,035 N/A N/A N/A
Deferred.................................. 1,454,808 N/A N/A N/A
----------- ----------- ---------- -----------
Total income taxes................ 1,932,843 N/A N/A N/A
----------- ----------- ---------- -----------
NET INCOME.................................. $ 2,723,481 N/A N/A N/A
=========== =========== ========== ===========
NET INCOME PER COMMON SHARE:
Basic..................................... $ 0.29 N/A N/A N/A
=========== =========== ========== ===========
Diluted................................... $ 0.28 N/A N/A N/A
=========== =========== ========== ===========
WEIGHTED AVERAGE SHARES OUTSTANDING:
Basic..................................... 9,555,774 N/A N/A N/A
=========== =========== ========== ===========
Diluted................................... 9,713,020 N/A N/A N/A
=========== =========== ========== ===========
</TABLE>

See notes to financial statements.

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18

CORE MATERIALS CORPORATION

BALANCE SHEETS

<TABLE>
<CAPTION>
DECEMBER 31, DECEMBER 31,
1997 1996
------------ ------------
<S> <C> <C>
ASSETS
CURRENT ASSETS:
Cash...................................................... $ 100,356 $ 590,212
Mortgage-backed security investment....................... 3,217,349 3,295,049
Accounts receivable (less allowance for doubtful accounts:
1997 -- $133,000; 1996 -- $0)............................. 14,306,101 2,007,963
Inventories:
Work in process........................................ 1,163,611 1,585,644
Stores................................................. 2,143,108 1,757,055
------------ ------------
Total inventories...................................... 3,306,719 3,342,699
Deferred tax asset........................................ 455,002 291,000
Prepaid expenses and other current assets................. 307,059 344,440
------------ ------------
Total current assets................................... 21,692,586 9,871,363
Property, plant and equipment............................... 34,971,001 42,337,970
Accumulated depreciation.................................... (10,293,834) (17,269,489)
------------ ------------
Property, plant and equipment -- net........................ 24,677,167 25,068,481
Deferred tax asset -- net................................... 11,170,190 12,789,000
------------ ------------
TOTAL....................................................... $ 57,539,943 $ 47,728,844
============ ============
LIABILITIES AND STOCKHOLDERS' EQUITY
LIABILITIES:
Current liabilities:
Accounts payable.......................................... $ 8,140,802 $ 372,869
Notes payable -- Banks.................................... 3,997,120
Accrued liabilities:
Compensation and related benefits...................... 2,066,488 827,313
Interest............................................... 1,149,061
Other accrued liabilities.............................. 1,776,856 594,790
------------ ------------
Total current liabilities.............................. 17,130,327 1,794,972
Secured note payable........................................ 18,821,841 27,884,510
Deferred long-term gain..................................... 3,018,331
Postretirement benefits liability........................... 2,474,367 1,873,490
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Common stock -- $0.01 par value, authorized
shares -- 20,000,000;
Outstanding shares: 1997 -- 9,613,281;
1996 -- 9,474,583..................................... 96,133 94,746
Paid-in capital........................................... 16,049,861 15,918,193
Retained earnings (deficit)............................... (50,917) 162,933
------------ ------------
Total stockholders' equity............................. 16,095,077 16,175,872
------------ ------------
TOTAL....................................................... $ 57,539,943 $ 47,728,844
============ ============
</TABLE>

See notes to financial statements.

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19

CORE MATERIALS CORPORATION

STATEMENT OF STOCKHOLDERS' EQUITY

<TABLE>
<CAPTION>
COMMON STOCK
OUTSTANDING TOTAL
-------------------- PAID-IN RETAINED STOCKHOLDERS'
SHARES AMOUNT CAPITAL EARNINGS EQUITY
--------- -------- ----------- ----------- -------------
<S> <C> <C> <C> <C> <C>
Balance at January 1, 1997, restated
(note 12).......................... 9,474,600 $ 94,746 $15,918,193 $ 162,933 $16,175,872
Net Income........................... 2,723,481 2,723,481
Issuance of restricted stock to
employees.......................... 41,000 410 117,415 117,825
Unearned deferred stock
compensation....................... (117,825) (117,825)
Amortization of deferred stock
compensation....................... 50,555 50,555
Issuance of stock under stock option
plan............................... 100,000 1,000 81,500 82,500
Increase in Secured Note to
Navistar........................... (2,937,331) (2,937,331)
Other................................ (2,319) (23) 23 -- --
--------- -------- ----------- ----------- -----------
Balance at December 31, 1997......... 9,613,281 $ 96,133 $16,049,861 $ (50,917) $16,095,077
========= ======== =========== =========== ===========
</TABLE>

See notes to financial statements.

20
20

CORE MATERIALS CORPORATION

STATEMENT OF CASH FLOW

<TABLE>
<CAPTION>
YEAR ENDED
DECEMBER 31,
1997
------------
<S> <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income.................................................. $ 2,723,481
Adjustments to reconcile net income to net cash provided by
operating activities:
Depreciation.............................................. 2,074,093
Deferred income taxes..................................... 1,454,808
Loss on disposal of assets................................ 26,715
Amortization of gain on sale/leaseback transaction........ (28,176)
Compensation expense on stock awards...................... 50,555
Change in operating assets and liabilities:
Increase in accounts receivable........................ (12,298,138)
Decrease in inventories................................ 35,980
Decrease in prepaid and other assets................... 37,381
Increase in accounts payable........................... 7,767,933
Increase in accrued and other liabilities.............. 3,235,666
Increase in postretirement benefits liability.......... 600,877
------------
NET CASH PROVIDED BY OPERATING ACTIVITIES................... 5,681,175

CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures........................................ (10,340,851)
Proceeds from sale/leaseback transaction.................... 12,000,000
Payments on mortgage-backed security investment............. 77,700
Proceeds from sale of property and equipment................ 12,500
------------
NET CASH PROVIDED BY INVESTING ACTIVITIES................... 1,749,349

CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under line-of-credit............................. 7,647,120
Payments on lines-of-credit................................. (3,650,000)
Payments on secured note payable............................ (12,000,000)
Proceeds from exercise of stock options..................... 82,500
------------
NET CASH USED IN FINANCING ACTIVITIES....................... (7,920,380)

NET DECREASE IN CASH........................................ (489,856)

CASH AT BEGINNING OF YEAR................................... 590,212
------------

CASH AT END OF YEAR......................................... $ 100,356
============
Cash paid for:
Interest.................................................. $ 1,082,514
============
Income Taxes.............................................. $ 122,500
============

SUPPLEMENTAL DISCLOSURE OF NON-CASH FINANCING ACTIVITIES:
Increase in secured note payable to Navistar.............. $ 2,937,331
============
</TABLE>

See notes to financial statements.

21
21

CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS

1. BUSINESS FORMATION AND NATURE OF OPERATIONS

Core Materials Corporation ("Core Materials") was formed on October 8, 1996
by RYMAC Mortgage Investment Corporation ("RYMAC"), as a wholly owned
subsidiary, for the purpose of acquiring substantially all of the assets and
assuming certain of the liabilities of Columbus Plastics Operation ("Columbus
Plastics"), an operating unit of Navistar International Transportation Corp.
("Navistar"). Throughout these Notes to Financial Statements, references to
Columbus Plastics refers to the operations of Core Materials prior to the
acquisition.

On December 31, 1996, RYMAC merged into its wholly owned subsidiary, Core
Materials, by converting each outstanding common share of RYMAC into the right
to receive one common share of Core Materials, with Core Materials as the
surviving corporation and continuing registrant. Simultaneously, on December 31,
1996, Core Materials purchased substantially all of the assets and assumed
certain liabilities of Columbus Plastics (the "Acquisition") (see Note 4).

Core Materials produces compression Sheet Molding Composite ("SMC")
fiberglass reinforced plastic parts. Core Materials has two principal customers,
Navistar and Yamaha Motor Manufacturing Corporation.

2. BASIS OF PRESENTATION

Core Materials' year end is December 31. Columbus Plastics' historical year
end was October 31. In the accompanying financial statements, the historical
fiscal year of Columbus Plastics has been maintained through October 31, 1995,
its previous most recently audited financial statements prior to 1996. Effective
December 31, 1995, the year end was changed to conform to the year end of Core
Materials, the continuing legal entity and registrant.

Based upon the terms of the Acquisition, the transaction for financial
reporting and accounting purposes has been accounted for as a reverse
acquisition whereby Columbus Plastics is deemed to have acquired Core Materials.
However, Core Materials is the continuing legal entity and registrant for both
Securities and Exchange Commission filing purposes and income tax reporting
purposes. Consistent with reverse acquisition accounting treatment Core
Materials has carried forward the historical basis of the acquired assets and
assumed liabilities of Columbus Plastics and has revalued the basis of Columbus
Plastics' net assets to fair value at December 31, 1996. All other accompanying
financial statements for the year ended December 31, 1996 and prior reflect the
historical operations of Columbus Plastics. Note 5 contains the unaudited pro
forma combined statements of income of Core Materials for the twelve months
ended December 31, 1996 and the twelve months ended October 31, 1995, as if the
Acquisition had been consummated as of January 1, 1996 and November 1, 1994,
respectively.

Prior to the Acquisition, Columbus Plastics was not a "stand alone"
division or subsidiary of Navistar and was not generally accounted for
separately. As a result, the distinct and separate accounts necessary to present
individual Core Materials income statements for the year ended December 31,
1996, the two months ended December 31, 1995 and the year ended October 31, 1995
have not been maintained.

Also, prior to the Acquisition, Columbus Plastics did not maintain
corporate treasury, legal, tax, purchasing and other similar corporate support
functions. Corporate general and administrative expenses have not been
previously allocated to Columbus Plastics. For purposes of preparing the Core
Materials financial statements for the years prior to 1997, certain of these
corporate costs, along with other Navistar Truck Group expenses, were allocated
using an allocation method (see Note 13). However, Navistar's systems and
procedures do not provide sufficient information to develop a reasonable cost
allocation for income taxes, corporate debt and interest expense.

Accordingly, Statements of Revenues, Direct Expenses and Identified
Corporate Expenses before Interest and Taxes are presented for the year ended
December 31, 1996, the two months ended December 31, 1995 and the year ended
October 31, 1995. These statements include all Navistar corporate cost
allocations for which a reasonable method of allocating costs to the operations
of Columbus Plastics can be developed.

22
22
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

Prior to the Acquisition, purchases of inventory, payroll, capital and
other expenditures were funded through the Equity Investment account with
Navistar. Accounts payable to third party vendors and certain expense accruals
were processed and recorded at other Navistar locations. Remittances from sales
to third parties were collected by Navistar and were accounted for through the
Equity Investment account as were sales to Navistar's truck assembly operations.
Accordingly, Columbus Plastics has no operating cash flows and statements of
cash flows are not presented for the year ended December 31, 1996, the two
months ended December 31, 1995 and the year ended October 31, 1995. Note 8 to
the financial statements presents a reconciliation of the Navistar Equity
Investment account for the applicable periods.

3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

USE OF ESTIMATES -- The preparation of financial statements in conformity
with generally accepted accounting principles requires management to make
estimates and assumptions that affect the reported amounts of assets and
liabilities, disclosure of contingent assets and liabilities and reported
amounts of revenues and expenses during the reporting period. Actual results
could differ from those estimates.

REVENUE RECOGNITION -- Revenue from product sales is recognized at the time
products are shipped. Effective January 1, 1997, sales to Navistar are recorded
at the prices stipulated in the Comprehensive Supply Agreement between Core
Materials and Navistar (the "Supply Agreement") (see Note 14), which approximate
fair value. Prior to 1997, Core Materials recorded sales to Navistar's
manufacturing plants at its standard cost at date of shipment.

MORTGAGE-BACKED SECURITY -- Pursuant to reverse acquisition accounting, the
mortgage backed security is recorded at its fair value at December 31, 1996,
which is the cost basis to Core Materials. The security which matures in
November 2025, is considered held to maturity, and is carried at cost. Core
Materials has the intent and ability to hold this security to maturity.

INVENTORIES -- Inventories are stated at the lower of cost (first-in,
first-out), or market.

PROPERTY, PLANT AND EQUIPMENT -- Property, plant and equipment are recorded
at cost. Depreciation is provided on a straight line method over the estimated
useful lives of the assets. The carrying amount of long-lived assets is
evaluated annually to determine if adjustment to the depreciation period or to
the unamortized balance is warranted. Such evaluation is based principally on
the expected utilization of the long-lived assets.

Ranges of estimated useful lives for computing depreciation are as follows:

<TABLE>
<S> <C>
Land improvements........................................... 20 years
Building and improvements................................... 20-50 years
Machinery and equipment..................................... 3-25 years
Tools, dies and patterns.................................... 3-5 years
</TABLE>

Depreciation expense was $2,074,000, $1,847,000, $275,000, and $1,338,000
for the years ended December 31, 1997 and 1996, the two months ended December
31, 1995 and the year ended October 31, 1995, respectively.

In 1997, approximately $180,000 of interest costs were capitalized. Prior
to December 31, 1996, Core Materials did not record capitalized interest on
construction in progress as interest expense was not allocated by Navistar to
Columbus Plastics.

SELF-INSURANCE -- The Company is self-insured with respect to medical and
dental claims and workers' compensation claims. The Company has recorded an
estimated liability for self-insured medical and dental claims incurred and
worker's compensation claims incurred but not reported at December 31, 1997 of
$469,000. As part of the Asset Purchase Agreement, Navistar assumed the
liability for these items at December 31, 1996.
23
23
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

INCOME TAXES -- Core Materials accounts for income taxes in accordance with
Statement of Financial Accounting Standards (SFAS) No. 109, "Accounting for
Income Taxes" which uses the liability method to calculate deferred income
taxes. This standard requires, among other things, recognition of future tax
benefits, measured by enacted tax rates, attributable to deductible temporary
differences between the financial statement basis and income tax basis of assets
and liabilities and net operating loss carry forwards to the extent realization
is more likely than not.

FAIR VALUE OF FINANCIAL INSTRUMENTS -- Core Materials' financial
instruments consist of a mortgage-backed security investment, a secured note
payable, accounts receivable and accounts payable. The carrying amount of the
financial instruments approximated their fair value.

EARNINGS PER COMMON SHARE -- Core Materials presents earnings per common
share in accordance with SFAS No. 128, "Earnings per Share." Under SFAS No. 128,
basic earnings per common share is computed based on the weighted average number
of common shares outstanding during the period. Diluted earnings per common
share is computed similarly but includes the effect of the exercise of stock
options under the treasury stock method. For years prior to 1997, earnings per
share is not presented as Columbus Plastics was not a stand alone division or
subsidiary of Navistar and was generally not accounted for separately during
periods presented. In calculating net income per share for 1997, weighted
average shares increased for the computation of diluted income per share by
157,246 due to the effect of stock options, which reduced net income per share
by $0.01.

RECLASSIFICATIONS -- Reclassifications have been made to prior years'
amounts to conform with the classifications of such amounts for 1997.
Additionally, the Company has recorded reclassifications between the December
31, 1996 secured notes payable and the postretirement benefits liability
including the related deferred tax asset impact (see Note 12).

NEW ACCOUNTING PRONOUNCEMENTS

In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130, "Reporting Comprehensive Income" (SFAS
130). SFAS 130 establishes standards for reporting and display of comprehensive
income and its components. This statement is effective for fiscal years
beginning after December 15, 1997. This standard expands or modifies disclosures
and, accordingly, will have no impact on the Company's reported financial
position, results of operations and cash flows.

In February 1998, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards No. 132, "Employers' Disclosures about
Pensions and Other Postretirement Benefits." This statement revises standards
for disclosures about pension and other postretirement benefit plans and is
effective for fiscal years beginning after December 15, 1997. This standard
expands or modifies disclosure and, accordingly, will have no impact on the
company's reported financial position, results of operations and cash flows.

4. ACQUISITION

On December 31, 1996 Core Materials acquired substantially all of the
assets and assumed certain liabilities of Columbus Plastics for (1) a
$27,884,510 (as adjusted, see Note 12) Secured Note due Navistar, subject to
adjustment, and (2) 4,264,000 shares of Core Materials common stock,
representing approximately 45% of the total number of shares of Core Materials
common stock then issued and outstanding.

In connection with the Acquisition, Core Materials is required to pay
Navistar future consideration in the form of an increase in the Secured Note
based upon a multiple of the amount by which Core Materials' earnings before
interest and taxes (EBIT), as defined in the Asset Purchase Agreement, exceeds
established thresholds

24
24
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

over the three year period 1997 to 1999. The future consideration will be based
upon a multiple of the defined EBIT as follows:

- 1997: If EBIT exceeds $6,512,000, then future consideration will be the
excess multiplied by 5.55.

- 1998: If EBIT exceeds $6,512,000, then the future consideration will be
the product of the 1998 excess EBIT less the 1997 excess EBIT multiplied
by 4.50.

- 1999: If EBIT exceeds $6,512,000, then the future consideration will be
the product of the 1999 excess EBIT less the 1998 excess EBIT multiplied
by 2.75.

The maximum increase in the Secured Note, as a result of future
consideration, is limited to $24,496,000. Such increases will be accounted for
by reducing Core Materials' retained earnings and will increase the amount of
the balloon payment due in November 2006. For the year ended December 31, 1997,
Core Materials EBIT, as defined in the Asset Purchase Agreement, exceeded the
established threshold by $529,249. This excess resulted in additional
consideration due to Navistar of $2,937,331.

Based upon the terms of the Acquisition, the transaction for financial
reporting and accounting purposes has been accounted for as a reverse
acquisition whereby Columbus Plastics is deemed to have acquired Core Materials.
Consistent with reverse acquisition accounting treatment, the purchase price
should be determined as the fair value of the consideration paid or received
whichever is more clearly evident. Because RYMAC's stock was thinly traded and
supported a company with no operations (prior to the Acquisition), the fair
value of RYMAC's then outstanding common stock was not appropriate to determine
the Acquisition purchase price. Instead the purchase price was determined based
upon the fair value of the consideration received (Core Materials' assets and
liabilities) by Columbus Plastics. The purchase price was approximately $16.0
million, calculated as follows, and excludes any future consideration to be paid
if certain earnings thresholds are met:

<TABLE>
<S> <C>
Cash........................................................ $ 584,351
Mortgage-backed assets...................................... 3,295,049
Other assets................................................ 122,935
Deferred tax asset, net..................................... 12,455,000
Accrued expenses............................................ (492,649)
-----------
$15,964,686
===========
</TABLE>

Transaction costs incurred by the acquirer in connection with the
acquisition of a company without operating substance should be treated similar
to that of an offering of equity securities as a reduction of paid-in capital.
Since the recording of Navistar's transaction costs at Core Materials would
result in no net impact to Core Materials' balance sheet, Navistar's transaction
costs are excluded from the purchase price.

25
25
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

5. PRO FORMA COMBINED FINANCIAL INFORMATION (UNAUDITED)

The following unaudited pro forma combined statements of income for the
twelve month periods ended December 31, 1996 and October 31, 1995 are presented
as if the Acquisition had occurred as of January 1, 1996 and November 1, 1994,
respectively . This pro forma information is not necessarily indicative of the
actual results of operations which would have occurred had the transactions
occurred on such dates or which may occur in the future.

UNAUDITED PRO FORMA COMBINED STATEMENT OF INCOME
TWELVE MONTHS ENDED DECEMBER 31, 1996

<TABLE>
<CAPTION>
PRO FORMA ADJUSTMENTS
--------------------------------------
HISTORICAL SUPPLY & PROFORMA
COLUMBUS SERVICES ADJUSTED
PLASTICS ACQUISITION NOTE AGREEMENT NOTE BALANCE NOTE
----------- ----------- ---- ---------- ---- ----------- ----
<S> <C> <C> <C> <C> <C> <C> <C>
Net Sales:
Navistar..................... $31,546,315 $4,123,000 (b) $35,669,315
Yamaha....................... 19,759,033 19,759,033
Other........................ 1,161,461 1,161,461
----------- ---------- -----------
Total.......................... 52,466,809 4,123,000 56,589,809
Cost of sales.................. 46,148,086 46,148,086
Postretirement benefits
expense...................... 879,487 879,487
----------- -----------
Total cost of sales............ 47,027,573 47,027,573
Gross margin................... 5,439,236 4,123,000 9,562,236
----------- ---------- -----------
Selling, general and
administrative expense....... 5,078,487 $ 864,000 (d) 5,942,487
Postretirement benefits
expense...................... 163,307 163,307
----------- ----------- -----------
Total selling, general and
administrative expense....... 5,241,794 864,000 6,105,794
----------- ----------- -----------
Other income................... 349,604 349,604
----------- ----------- ---------- -----------
Income before interest and
taxes........................ 547,046 (864,000) 4,123,000 3,806,046
Interest income................ 230,650 (a) 230,650
Interest (expense)............. (1,841,120) (c) (1,841,120)
----------- ----------- ---------- -----------
Income before income taxes..... $ 547,046 $(2,474,470) $4,123,000 $ 2,195,576
Estimated income taxes......... 905,895 (f)
-----------
Net income..................... $ 1,289,681
-----------
Net income per share:
Basic........................ $ .14
===========
Diluted...................... $ .13
===========
Weighted average shares
outstanding:
Basic........................ 9,474,583 (e)
===========
Diluted...................... 9,580,693 (e)
===========
</TABLE>

26
26
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

UNAUDITED PRO FORMA COMBINED STATEMENT OF INCOME
TWELVE MONTHS ENDED OCTOBER 31, 1995

<TABLE>
<CAPTION>
PRO FORMA ADJUSTMENTS
---------------------------------------
HISTORICAL SUPPLY & PROFORMA
COLUMBUS SERVICES ADJUSTED
PLASTICS ACQUISITION NOTE AGREEMENT NOTE BALANCE NOTE
----------- ------------ ---- ---------- ---- ----------- ----
<S> <C> <C> <C> <C> <C> <C> <C>
Net Sales:
Navistar....................... $37,777,164 $5,866,200 (b) $43,643,364
Yamaha......................... 20,221,722 20,221,722
Other.......................... 1,506,243 1,506,243
----------- ---------- -----------
Total sales...................... 59,505,129 5,866,200 65,371,329
----------- ---------- -----------
Cost of sales.................... 48,458,210 48,458,210
Postretirement benefits
expense........................ 680,857 680,857
----------- -----------
Total cost of sales.............. 49,139,067 49,139,067
----------- -----------
Gross margin..................... 10,366,062 5,866,200 16,232,262
----------- ---------- -----------
Selling, general and
administrative expense......... 5,345,008 $ 864,000 (d) 6,209,008
Postretirement benefits
expense........................ 176,241 176,241
----------- ----------- -----------
Total selling, general and
administrative expense......... 5,521,249 864,000 6,385,249
----------- ----------- -----------
Other expense.................... (55,241) (55,241)
----------- ----------- ---------- -----------
Income before interest and
taxes.......................... 4,789,572 (864,000) 5,866,200 9,791,772
Interest income.................. 230,650 (a) 230,650
Interest (expense)............... (2,211,120) (c) (2,211,120)
----------- ----------- ---------- -----------
Income before income taxes....... $ 4,789,572 $(2,844,470) $5,866,200 7,811,302
Estimated income taxes........... 3,222,943 (f)
-----------
Net income....................... $ 4,588,359
===========
Net income per share:
Basic.......................... $ .48
===========
Diluted........................ $ .48
===========
Weighted average shares
outstanding:
Basic.......................... 9,474,583 (e)
===========
Diluted........................ 9,580,693 (e)
===========
</TABLE>

The Unaudited Proforma Combined Statements of Income for the twelve months
ended December 31, 1996 and October 31, 1995 have been prepared assuming the
proposed acquisition had occurred on January 1, 1996 and November 1, 1994,
respectively and reflects the effects of certain adjustments to the historical
financial statements that result from the acquisition of Columbus Plastics by
Core Materials. Columbus Plastics was not a stand alone division or subsidiary
of Navistar and was not generally accounted for separately. Navistar's systems
and procedures do not provide sufficient information to develop a reasonable
cost allocation for income taxes and interest expense. Accordingly, historical
net income per common share amounts have not been included for the financial
information for Columbus Plastics. A historical statement of income for Core
Materials is not included in the unaudited proforma combined financial
information as the Acquisition was accounted for using reverse acquisition
accounting treatment.

(a) Represents the estimated interest income to be earned on the
mortgage-backed security at the security's effective interest rate of
7%.

27
27
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

(b) Represents the additional revenues resulting from pricing sales by Core
Materials to Navistar reflecting the prices specified in the
Comprehensive Supply Agreement, rather than at Core Materials
historical standard cost.

(c) Represents the estimated interest expense on the Secured Note due to
Navistar at 8% per annum less the interest credit of $520,000 and
$150,000 for the twelve months ended December 31, 1996 and October 31,
1995, respectively, which represents the capitalization of interest on
the Secured Note relating to property, plant and equipment under
construction.

(d) Represents an estimate of the additional administrative expenses to be
incurred by Core Materials as a result of its status as a stand-alone,
publicly owned company rather than an operating unit of a much larger
corporation. Additional costs consist primarily of broker fees, legal
fees, auditing fees, 10-K and 10-Q printing fees, officers' salaries
and directors' fees.

(e) The weighted average number of common shares outstanding used to
calculate basic and diluted net income per common share include the
number of shares of Core Materials common stock outstanding prior to
the acquisition and the number of shares issued to Navistar as
consideration for the Acquisition. The diluted weighted average shares
outstanding also includes the effect of the exercise of 260,000
dilutive Core Materials stock options, using the treasury stock method.

(f) Represents the estimated income tax expense for Core Materials based
upon a statutory Federal tax rate of 34% and an estimated Ohio state
and local tax rate of 11%. The income tax expense recorded in the
unaudited pro forma combined financial statements is not necessarily
indicative of the cash payments for income taxes that Core Materials
would be required to pay due to Core Materials' substantial net
operating loss carryforwards. Core Materials expects to only be
required to make minimal Federal income tax payments as mandated,
primarily, by the Alternative Minimum Tax regulations until such time
that the loss carryforwards are fully utilized or expired.

6. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consists of the following:

<TABLE>
<CAPTION>
DECEMBER 31, DECEMBER 31,
1997 1996
------------ ------------
<S> <C> <C>
Land and land improvements.................... $ 2,024,566 $ 1,607,066
Building and equipment........................ 22,955,364 38,933,211
Tools, dies and patterns...................... 334,761 299,135
Construction in progress...................... 9,656,310 1,498,558
------------ ------------
Total......................................... 34,971,001 42,337,970
Less accumulated depreciation................. (10,293,834) (17,269,489)
------------ ------------
Property, plant and equipment -- net.......... $24 ,677,167 $ 25,068,481
============ ============
</TABLE>

Construction in progress at December 31, 1997, primarily relates to the
construction and equipping of a new 110,900-square-foot facility in Gaffney,
South Carolina to expand Core Materials' molding and assembly capacities. At
December 31, 1997, commitments for capital expenditures in progress were
$2,494,000.

In December 1997, Core Materials entered into a sale leaseback arrangement
with a financial institution, whereby it sold certain equipment with an original
cost of approximately $17,541,000 and a net book value of approximately
$8,619,000 (see Note 7).

28
28
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

7. DEBT AND LEASES

SECURED NOTE PAYABLE

The Secured Note payable is due to Navistar and bears interest at the rate
of 8% per annum, payable semi-annually, and is secured by a subordinated lien
and security interest in all of Core Materials' assets. The Secured Note is due
in November 2006. In connection with the acquisition, Core Materials is also
required to pay Navistar future consideration in the form of an increase in the
principal amount of the Secured Note if Core Materials achieves earnings before
interest and taxes in excess of established thresholds during the period of 1997
through 1999 (see Note 4).

Principal payments under the secured note are due as follows:

(a) Within ninety (90) days after the end of each fiscal year of Core
Materials during the term of the Secured Note, Core Materials shall pay
principal in an amount equal to the amount, if any, by which the total cash
and cash equivalents of Core Materials, as of the end of such fiscal year,
exceeds $3,000,000, as long as there is no outstanding balance on the
revolving line of credit and Core Materials is in compliance with all loan
covenants; and

(b) In the event Core Materials obtains, from time to time, any
refinancing loan (as defined by the terms of the Secured Note), Core
Materials shall promptly upon obtaining such loan pay principal in an
amount equal to the proceeds of such loan.

Based upon the financial position of Core Materials' at December 31, 1997,
the Secured Note is classified as long-term on the balance sheet.

In 1997, a refinancing arrangement was entered into with a financial
institution whereby Core Materials received $12,000,000 from a sale/leaseback
transaction. The proceeds from this transaction were used to repay principal on
the Secured Note due to Navistar.

Based on Core Materials' earnings for the year ended December 31, 1997, the
Secured Note was increased by $2,937,000 in accordance with the provisions of
the Asset Purchase Agreement (see Note 4). During 1997, the final purchase price
adjustments were reviewed by Core Materials and Navistar management. As a result
of this review, it was agreed that Core Materials would assume an additional
$1,629,000 of accumulated benefits obligations relating to postretirement
benefits at December 31, 1996 and reduce the secured note payable to Navistar by
the same amount and amend the December 31, 1996 closing balance sheet of
Columbus Plastics to reflect the reclassification of these two long-term
liabilities (see Note 12).

The provisions of the Secured Note prohibit the declaration or payment of
cash dividends, the repurchase or retirement of capital stock, as well as the
pledge of any of Core Materials' assets or revenue as a security lien to a third
party, except as approved by Navistar, as long as the Secured Note is
outstanding.

LINE OF CREDIT

At December 31, 1997, Core Materials had available a $7,500,000 variable
rate revolving line of credit. This facility, which matures on November 30,
1999, is secured by a first priority lien and security interest in all Core
Materials' business assets. The line of credit bears interest at LIBOR plus two
percent or prime as elected by Core Materials.

At December 31, 1997, Core Materials also had a $3,000,000 variable rate
line of credit secured by the Company's mortgage-backed security investment.
This facility bears interest at prime and was terminated by the Company in
January 1998.

The total outstanding balance under these facilities at December 31, 1997
was $3,997,120 at a weighted average interest rate of 8.37%. These facilities
did not exist at December 31, 1996.

29
29
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

LETTERS OF CREDIT

Core Materials also had commitments at December 31, 1997, from a financial
institution to provide a $7,500,000 standby letter of credit to support the
issuance of Industrial Revenue Bonds and $5,500,000 of equipment leasing for the
Company's new facility in South Carolina.

LEASES

In December 1997 Core Materials entered into a sale-leaseback arrangement
with a financial institution. Equipment, consisting primarily of SMC presses
with a net book value of approximately $8,619,000, was sold for $12,000,000 and
leased back under a 10 year lease agreement. The lease agreement meets the
criteria to be accounted for as an operating lease. Core Materials recorded a
deferred gain of approximately $3,381,000 on the transaction which will be
amortized over the life of the lease. The current portion of the deferred gain,
approximately $335,000, is recorded in other accrued liabilities. For the year
ended December 31, 1997, Core Materials recognized into income approximately
$28,000 of the deferred gain. Proceeds from the sale-leaseback of $12,000,000
were used to reduce a portion of the principal on the Secured Note payable due
to Navistar.

Core Materials also leases certain equipment under operating leases entered
in prior years with original lease terms of 9.5 to 10 years.

Total rental expense was $701,000, $563,000, $83,000 and $560,000 for the
years ended December 31, 1997 and 1996, the two months ended December 31, 1995
and the year ended October 31, 1995, respectively.

The future minimum lease payments under non-cancelable operating leases
that have lease terms in excess of one year are as follows:

<TABLE>
<S> <C>
1998........................................................ $ 1,999,000
1999........................................................ 1,604,000
2000........................................................ 1,604,000
2001........................................................ 1,445,000
2002........................................................ 1,457,000
Thereafter.................................................. 8,713,000
-----------
Total minimum lease payments................................ $16,822,000
===========
</TABLE>

30
30
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

8. EQUITY INVESTMENT ACCOUNT

Prior to January 1, 1997, cash flows for purchases of inventory, payroll,
capital expenditures, and other expenditures were funded through the
intercompany Equity Investment account with Navistar. The following summarizes
the changes in the Equity Investment account for the periods presented:

<TABLE>
<CAPTION>
TWO MONTHS
YEAR ENDED ENDED YEAR ENDED
DECEMBER 31, DECEMBER 31, OCTOBER 31,
1996 1995 1995
------------ ------------ ------------
<S> <C> <C> <C>
Balance -- beginning of period...................... $ 24,206,408 $ 20,140,446 $ 14,489,444
Funding of purchases................................ 45,922,756 9,870,093 37,766,508
Net charges from Navistar........................... 19,695,932 3,032,887 19,991,165
Navistar funding of plant expenses and other........ 2,777,608 300,196 2,076,547
Net charges to Navistar............................. (36,030,151) (6,344,451) (37,368,465)
Collections from third parties...................... (27,781,025) (3,336,388) (21,604,325)
Income before interest and taxes.................... 547,046 543,625 4,789,572
Push down of postretirement benefit liabilities
from Navistar..................................... (1,757,490)
Issuance of Core Materials common stock............. (27,581,084)
------------ ------------ ------------
Balance -- end of period............................ $ $ 24,206,408 $ 20,140,446
============ ============ ============
</TABLE>

Funding of Purchases -- represents amounts funded by Navistar primarily for
purchases of materials and capital expenditures.

Net Charges From Navistar -- represents amounts charged for payroll and
related expenses, charges for employee health and welfare plans, payments to
union sponsored pension plans and all corporate support services.

Navistar Funding of Plant Expenses -- represents amounts transferred to
Columbus Plastics from Navistar as reimbursement for expenses paid by Columbus
Plastics.

Net Charges to Navistar -- represents the intercompany sales and charges by
Columbus Plastics to other Navistar manufacturing plants for the sale of SMC
products.

Collections From Third Parties -- represents amounts collected by Columbus
Plastics on sales to third parties, primarily Yamaha, and collections on
billings for tooling projects.

Push Down of Postretirement Benefit Liabilities From Navistar -- represents
the push down from Navistar to Core Materials of the projected postretirement
benefit obligations which were assumed by Core Materials, see Note 12.

Issuance of Core Materials Common Stock -- reverse acquisition accounting
treatment requires that the retained earnings carried forward to Core Materials
as of December 31, should consist of Columbus Plastics' Equity Investment
account, less an amount equivalent to the par value of Core Materials common
stock owned by Navistar. This item represents the transfer of the Equity
Investment account to common stock and retained earnings.

9. EQUITY

ANTI-TAKEOVER MEASURES

Core Materials' Certificate of Incorporation and By-laws contain certain
provisions designed to discourage specific types of transactions involving an
actual or threatened change of control of Core Materials. These

31
31
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

provisions, which are designed to make it more difficult to change majority
control of the Board of Directors without its consent, include the following:

Removal of Directors -- This provision provides that a director of
Core Materials may be removed with or without cause only upon the vote of
the holders of at least 80% of the voting power of the outstanding shares
of capital stock entitled to vote generally in the election of directors.

Supermajority Approval -- This provision requires that a merger and
certain other transactions (as outlined in the Certificate of
Incorporation) be approved by the affirmative vote of the holders of at
least 66 2/3% of the then outstanding shares of Core Materials' common
stock. Such affirmative vote is required notwithstanding the fact that no
vote may be required, or that a lesser percentage may be specified by law.

Amendments -- This provision requires that any amendment to the
provisions relating to the removal of directors be approved by the holders
of at least 80% of the then outstanding shares of voting stock, and any
amendment to provisions requiring the approval of the holders of at least
66 2/3% of the then outstanding shares of voting stock be approved by the
holders of at least 66 2/3% of the then outstanding shares of voting stock.

RESTRICTIONS ON TRANSFER

Core Materials' Certificate of Incorporation also contains a provision (the
"Prohibited Transfer Provision") designed to help assure the continued
availability of Core Materials' substantial net operating loss and capital loss
carryforwards by seeking to prevent an "ownership change" as defined under
current Treasury Department income tax regulations. Under the Prohibited
Transfer Provision, if a stockholder transfers or agrees to transfer stock, the
transfer will be prohibited and void to the extent that it would cause the
transferee to hold a "Prohibited Ownership Percentage" (as defined in Core
Materials' Certificate of Incorporation, but generally, means direct and
indirect ownership of 4.5% or more of the Company's common stock) or if the
transfer would result in the transferee's ownership increasing if the transferee
had held a Prohibited Ownership Percentage within the three prior years or if
the transferee's ownership percentage already exceeds the Prohibited Ownership
Percentage under applicable Federal income tax rules. The Prohibited Transfer
Provision does not prevent transfers of stock between persons who do not hold a
Prohibited Ownership Percentage.

RESTRICTED COMMON STOCK

In 1997, Core Materials issued, in total, 41,000 shares of common stock,
par value $0.01 per share, to 410 employees (which constituted all of its
employees at the time of grant with the exception of certain executive
employees). The Company received no consideration for the issued shares. The
shares were issued as an incentive for its employees to remain with the Company
and are subject to forfeiture to the Company if an employee leaves prior to
December 31, 1998. During this period, the shares may not be transferred. At
December 31, 1997, 23 of these employees terminated service with Core Materials
and, therefore, the 2,300 shares were forfeited and retired. The market value of
the shares at the dates of grant totaled $117,825 which will be recognized
ratably as compensation expense, net of forfeitures, over the period of the
restriction and is recorded as a contra equity account and included in paid in
capital. During 1997, Core Materials expensed $51,000 related to these shares.

PREFERRED STOCK

Core Materials has authorized 10,000,000 shares of preferred stock (par
value: $0.01) of which none is issued.

32
32
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

10. INCENTIVE STOCK PLANS

STOCK OPTIONS

The Company has a Long Term Equity Incentive Plan (the "Plan"), as approved
by the shareholders in May, 1997, that allows for grant to directors and key
employees of non-qualified stock options, incentive stock options, stock
appreciation rights, restricted stock, performance shares, performance units and
other incentive awards up to an aggregate of 1.5 million awards, each
representing a right to buy a share of Core Materials' common stock. The Plan
expires on the earlier of December 31, 2006, or the date the maximum number of
available awards under the plan have been granted.

During 1997, the Company granted non-qualified stock options and incentive
stock options to directors and certain employees. The options have vesting
schedules of five or ten years from the date of grant, are not exercisable after
ten years from the date of grant, and were granted at prices which equal fair
market value of Core Materials' common stock at the date of grant.

At the time of the merger of RYMAC into Core Materials, each outstanding
option to purchase shares of RYMAC's common stock granted under any of RYMAC's
previous stock option plans was deemed amended to constitute an option to
acquire, at the same price per share, the same number of shares of Core
Materials' common stock.

At December 31, 1996, there were 260,000 outstanding options from the RYMAC
Plans, each to purchase one share of Core Materials' common stock at prices
ranging from $0.75 to $1.50, all of which were exercisable. All of the options
are held by former executive officers and a former director of RYMAC.

The Company accounts for its stock option plans in accordance with APB
Opinion No. 25, under which no compensation cost has been recognized. Had
compensation cost for all stock option plans been determined consistent with the
SFAS No. 123, "Accounting for Stock Based Compensation," the Company's pro forma
net income and net income per common share would have been $2,657,418 and $.28
per basic share or $.27 per diluted share for fiscal 1997, respectively.

The pro forma amounts are not representative of the effects on reported net
income or net income per common share for future years.

The following summarizes all stock option transactions for the Company
under the plans from January 1, 1997 through December 31, 1997:

<TABLE>
<CAPTION>
WEIGHTED
NUMBER OF AVERAGE
SHARES EXERCISE PRICE
--------- --------------
<S> <C> <C>
Outstanding as of December 31,1996......................... 260,000 $0.81
Options granted............................................ 796,000 2.82
Options exercised.......................................... (100,000) 0.83
Options forfeited.......................................... (16,000) 2.77
-------- -----
Outstanding as of December 31, 1997........................ 940,000 $2.48
======== =====
Exercisable as of December 31, 1997........................ 221,850 $1.34
======== =====
Options available for grant as of December 31, 1997........ 720,000
========
</TABLE>

33
33
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

The following table summarizes information about stock options outstanding and
exercisable as of December 31, 1997:

<TABLE>
<CAPTION>
OPTIONS OUTSTANDING OPTIONS EXERCISABLE
--------------------------------------------- --------------------------
WEIGHTED
WEIGHTED AVERAGE WEIGHTED
NUMBER OF AVERAGE CONTRACTUAL LIFE NUMBER OF AVERAGE
OPTIONS EXERCISE PRICE (YEARS) OPTIONS EXERCISE PRICE
Range of Exercise Price --------- -------------- ---------------- --------- --------------
<S> <C> <C> <C> <C> <C>
$0.75-$1.50 160,000 $0.80 6.8 160,000 $0.80
$2.75-$2.81 715,500 2.75 9.3 61,850 2.75
$3.47-$3.81 64,500 3.62 9.8 --
------- ----- ------- -----
940,000 $2.48 221,850 $1.34
======= ===== ======= =====
</TABLE>

The weighted average fair value of options granted during 1997 was $1.93.
The fair value of the options granted were estimated on the date of grant using
the Black-Scholes option-pricing model with the following assumptions: risk-free
interest rate of 6.0%, no expected dividend yield, expected lives of 8 and 10
years, expected volatility of 52%.

11. INCOME TAXES

Components of the provision for income taxes are as follows:

<TABLE>
<CAPTION>
YEAR ENDED
DECEMBER 31,
1997
------------
<S> <C>
Currently Payable:
Federal..................................................... $ 66,000
State and local............................................. 412,000
----------
478,000
Deferred Taxes:
Federal..................................................... 1,346,000
State and local............................................. 109,000
----------
1,455,000
----------
Provision for income taxes.................................. $1,933,000
----------
</TABLE>

No income tax expense was recorded in the financial statements for the year
ended December 31, 1996, the two month period ended December 31, 1995 and the
year ended October 31, 1995 as Navistar's systems and procedures did not provide
sufficient information to develop a reasonable allocation of income tax expense
to Columbus Plastics.

A reconciliation of the income tax provision based on the federal statutory
income tax rate to the Company's income tax provision is as follows:

<TABLE>
<CAPTION>
YEAR ENDED
DECEMBER 31,
1997
------------
<S> <C>
Provision at federal statutory rate......................... $1,583,000
State and local tax expense, net of federal benefit......... 339,000
Non-deductible expenses..................................... 11,000
----------
Total....................................................... $1,933,000
==========
</TABLE>

34
34
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

Deferred tax assets (liabilities) consist of the following:

<TABLE>
<CAPTION>
DECEMBER 31, DECEMBER 31,
1997 1996
------------ ------------
<S> <C> <C>
Current asset (liability):
Accrued liabilities..................................... $ 406,000 $ 321,000
Other, net.............................................. 49,000 (30,000)
----------- -----------
Total current asset..................................... 455,000 291,000
Non-current asset (liability):
Property, plant and equipment........................... 4,465,000 5,356,000
Net operating loss carryforwards........................ 9,798,000 10,910,000
Capital loss carryforwards.............................. 3,017,000 3,017,000
Postretirement benefits................................. 1,066,000 791,000
Other, net.............................................. (389,000) (498,000)
----------- -----------
Total non-current asset................................. 17,957,000 19,576,000
----------- -----------
Total deferred tax asset.................................. 18,412,000 19,867,000
Less valuation allowance.................................. (6,787,000) (6,787,000)
----------- -----------
Total deferred tax asset -- net........................... $11,625,000 $13,080,000
=========== ===========
</TABLE>

A valuation allowance has been provided for those net operating loss (NOL)
carryforwards and temporary differences which are estimated to expire before
they are utilized. A full allowance has been provided against the approximately
$8.9 million of capital loss carryforwards, because the capital loss
carryforwards are estimated to expire before they are utilized ($4.1 million
expire in 1999 and $4.8 million expire in 2001). At December 31, 1997, Core
Materials had approximately $28.8 million of NOL carryforwards available to
offset future taxable income. Such carryforwards reflect income tax losses
incurred which will expire as follows:

<TABLE>
<S> <C>
2007............................................ $13,334,000
2008............................................ 10,823,000
2009............................................ 3,614,000
2010............................................ 638,000
2011............................................ 357,000
-----------
Total........................................... $28,766,000
===========
</TABLE>

12. POSTRETIREMENT BENEFITS

Core Materials provides postretirement benefits to substantially all of its
employees. Costs associated with postretirement benefits include pension
expense, postretirement health care and life insurance expense and expense
related to contributions to a 401(k) defined contribution plan. In addition,
Core Materials also participates in a multi-employer defined benefit plan for
its union represented employees. Prior to the Acquisition, Core Materials'
employees were participants in various Navistar sponsored pension and
postretirement plans. Navistar allocated postretirement benefit costs to
Columbus Plastics based upon the number of Columbus Plastics participants and
their respective demographic data.

The Navistar pension plan for non-represented employees was
non-contributory and both benefits and years of service were frozen as of the
date of the Acquisition. In connection with the Acquisition, Navistar retained
responsibility for the vested benefits as of December 31, 1996 and Core
Materials agreed to reimburse Navistar for early retirement subsidies for
certain employees. The accumulated benefit obligation, which equals the

35
35

CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

projected benefit obligation and net liability is $147,000 at December 31, 1997
and $128,000 at December 31, 1996, respectively.

All of Core Materials' union employees are covered under a multi-employer
defined benefit pension plan under a collective bargaining agreement. This plan
is not administered by Core Materials and contributions are determined in
accordance with provisions in the negotiated labor contract. Pursuant to the
terms of the Asset Purchase Agreement, Navistar withdrew from the multi-employer
plan, and, simultaneously, Core Materials took over Navistar's former
responsibilities in regards to the multi-employer plan. Management has been
advised by the multi-employer plan's actuary that Navistar's withdrawal from the
plan will not result in a withdrawal liability.

The postretirement plan provides healthcare and life insurance for certain
employees upon their retirement along with their spouses and certain dependents
and calls for cost sharing between Core Materials, Navistar and the participants
in the form of premiums, co-payments and deductibles. Core Materials and
Navistar share the cost of benefits for certain employees, pursuant to the Asset
Purchase Agreement, using a formula that allocates the cost based upon the
respective portion of time that the employee was an active service participant
after the Acquisition to the period of active service prior to the Acquisition.
During 1997, Core Materials and Navistar management reviewed all purchase price
adjustments including the initial allocation of the Columbus Plastics December
31, 1996 accumulated postretirement benefit obligation. As a result of this
review, Core Materials and Navistar agreed that Core Materials would assume an
additional $1,629,000 of accumulated benefit obligations as of December 31, 1996
and Navistar would amend the December 31, 1996 closing balance sheet of Columbus
Plastics to reflect this increase in benefit obligation resulting in an equal
reduction in the Core Materials Secured Note to Navistar. The reclassification
of $1,629,000 between the two long-term liabilities has been recorded to the
December 31, 1996 balance sheet to reflect the final purchase price allocation
and to present the two years on a comparative basis. In addition, the deferred
tax asset related to the additional accumulated benefit obligation has also been
recorded in the December 31, 1996 balance sheet as an increase in retained
earnings consistent with reverse acquisition accounting. The funded status of
other postretirement benefits as of December 31 is as follows:

<TABLE>
<CAPTION>
1997 1996
----------- -----------
<S> <C> <C>
Accumulated other postretirement benefit
obligation...................................... ($2,438,194) ($1,629,490)
Plan assets....................................... 0 0
----------- -----------
Funded status..................................... (2,438,194) (1,629,490)
Unrecognized loss................................. 372,663
----------- -----------
Net liability..................................... ($2,065,531) ($1,629,490)
=========== ===========
</TABLE>

36
36
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

The components of expense for all of Core Materials' postretirement benefit
plans are as follows:

<TABLE>
<CAPTION>
TWO MONTHS
YEAR ENDED YEAR ENDED ENDED YEAR ENDED
DECEMBER 31, DECEMBER 31, DECEMBER 31, OCTOBER 31,
1997 1996 1995 1995
------------ ------------ ------------ -----------
<S> <C> <C> <C> <C>
Pension expense:
Interest cost.................. $ 10,000
Corporate allocation........... $ 229,000 $ 31,000 $229,000
-------- ---------- -------- --------
10,000 229,000 31,000 229,000
-------- ---------- -------- --------
Defined contribution plan
contributions............... 160,877 -- -- --
-------- ---------- -------- --------
Multi-employer plan
contributions............... 266,962 275,794 45,108 235,098
-------- ---------- -------- --------
Health and life insurance:
Service cost................... 307,000
Interest cost.................. 130,000
Corporate allocation........... 538,000 75,000 393,000
-------- ---------- -------- --------
437,000 538,000 75,000 393,000
-------- ---------- -------- --------
Total postretirement benefits
expense........................ $874,839 $1,042,794 $151,108 $857,098
======== ========== ======== ========
</TABLE>

The discount rate used to determine the accumulated pension benefit
obligation and the accumulated other postretirement benefit obligation was 8%
and 7% at December 31, 1996 and 1997, respectively. For 1998, the weighted
average rate of increase in the per capita cost of covered health care benefits
is projected to be 8%. The rate is projected to decrease to 5% by the year 2003
and remain at the level each year thereafter. If the cost trend rate assumptions
were increased by one percentage point for each year, the accumulated
postretirement benefit obligation would increase by approximately 12% and the
associated expense recognized for the year ended December 31, 1997 would
increase by an estimated 21%.

13. CORPORATE ALLOCATIONS

Prior to its acquisition by Core Materials, Columbus Plastics did not
maintain corporate treasury, legal, tax, purchasing and other similar corporate
support functions. Columbus Plastics did record certain budgeted corporate
expenses related primarily to employee benefits, real estate taxes and
insurance. Adjustments to these amounts to reflect actual expenditures were not
recorded by Columbus Plastics but are included in the corporate allocation
amounts noted below. For purposes of preparing the financial information for
Columbus Plastics certain corporate costs and credits along with other Navistar
Truck Group expenses which were not budgeted to Columbus Plastics were allocated
based upon a variety of factors which include the size of the Columbus Plastics
operation, the number of Columbus Plastics employees, and the identification of
costs specifically attributable to Columbus Plastics. Management believes that
the allocation method used is reasonable and reflective of Columbus Plastics'
proportionate share of such expenses and is comparable to those that would have
been incurred on a stand-alone basis.

The following summarizes the corporate costs (credits) allocated to
Columbus Plastics, in the financial statements included herein, which were not
budgeted and recorded by Columbus Plastics. The amounts represent adjustments to
the budgeted expenses or allocations of Navistar Corporate and Truck Group
Marketing and Administrative expenses.

37
37
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

<TABLE>
<CAPTION>
TWO MONTHS YEAR
YEAR ENDED ENDED ENDED
DECEMBER 31, DECEMBER 31, OCTOBER 31,
1996 1995 1995
------------ ------------ -----------
<S> <C> <C> <C>
Total cost of sales.................................... $(465,321) $(111,512) $(226,128)
--------- --------- ---------
Total selling, general and administrative expense...... $ 434,321 $ 65,512 $ 450,128
--------- --------- ---------
</TABLE>

14. RELATED PARTIES

In connection with the acquisition, Core Materials and Navistar entered
into a Supply Agreement and a Transitional Services Agreement (the "Services
Agreement"). Under the terms of the Supply Agreement, for a rolling five year
period commencing December 31, 1996, Navistar agreed to purchase from Core
Materials, and Core Materials agreed to sell to Navistar at negotiated prices,
which approximate fair value, all of Navistar's original equipment and service
requirements for Fiberglass Reinforced Parts using the Sheet Molding Composite
process as they existed or as they may be improved or modified. However, no
minimum quantities of annual production of products or minimum purchase
quantities are set forth or implied in the Supply Agreement, and no penalties
will be imposed on Navistar for volumes of products actually ordered by Navistar
below those quantities forecasted.

Under the terms of the Services Agreement, Navistar provided certain
accounting, payroll, human resources, and office support services to Core
Materials and procured insurance on Core Materials' behalf. Core Materials
expensed $183,000 for these services in 1997 of which $46,000 had not been paid
at December 31, 1997 and was included in accounts payable. Sales to Navistar in
1997 totaled $50,011,000 of which $10,519,000 had not been received at December
31, 1997 and was included in accounts receivable. Core Materials expensed
$2,322,000 for interest expense on the Secured Note in 1997, of which $1,135,000
had not been paid on December 31, 1997 and was included in accrued liabilities.

15. LABOR CONCENTRATION

At December 31, 1997, Core Materials employed a total of 433 employees, 344
of whom, at its Columbus, Ohio facility, are covered by a collective bargaining
agreement with the International Association of Machinists and Aerospace Workers
("IAM"). In January 1998, Core Materials announced that a new three year
seven-month labor agreement with the IAM had been reached which extends to
August 1, 2001.

38
38
CORE MATERIALS CORPORATION

NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

16. QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)

The following is a summary of the unaudited quarterly results of operations
for the years ended December 31, 1997 and December 31, 1996.

<TABLE>
<CAPTION>
1ST QUARTER 2ND QUARTER 3RD QUARTER 4TH QUARTER TOTAL YEAR
----------- ----------- ----------- ----------- -----------
<S> <C> <C> <C> <C> <C>
DECEMBER 31, 1997
Net sales................... $16,373,035 $16,659,250 $13,680,033 $18,227,640 $64,939,958
Gross margin................ 3,436,610 3,740,893 2,932,016 3,951,111 14,060,630
Income before interest and
taxes..................... 1,571,841 1,840,556 1,137,033 2,104,596 6,654,026
Net income.................. 604,312 766,235 381,960 970,974 2,723,481
Net income per common share:
Basic..................... $ .06 $ .08 $ .04 $ .10 $ .29(1)
Diluted................... $ .06 $ .08 $ .04 $ .10 $ .28
DECEMBER 31, 1996
Net sales................... $14,601,362 $13,470,420 $10,846,590 $13,548,437 $52,466,809
Gross margin................ 1,393,642 829,458 1,393,878 1,822,258 5,439,236
Income (loss) before
interest and taxes........ 66,730 (420,564) 50,081 850,799 547,046
Net income (2).............. NA NA NA NA NA
Net income per common share
(2)....................... NA NA NA NA NA
</TABLE>

- ---------------

(1) Sum of the quarters do not add up to total year due to rounding.

(2) Net Income and Net Income Per Share information has been omitted because
Core Materials was not a separate stand alone division or subsidiary of
Navistar and generally not accounted for separately prior to the
Acquisition.

******

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
FINANCIAL DISCLOSURE.

Core Materials previously reported a change in accountants as required by
this Part II, Item 9 in a Form 8-K, as amended by a Form 8-K/A (filed with the
Securities and Exchange Commission on January 14, 1997 and January 27, 1997,
respectively).

PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.

The information required by this Part III, Item 10 is incorporated herein
by reference from the Company's definitive proxy statement for its annual
meeting of stockholders to be held on or about May 28, 1998, which is expected
to be filed with the Securities and Exchange Commission pursuant to Regulation
14A of the Securities Exchange Act of 1934 within 120 days after the end of the
Company's fiscal year covered by this report.

39
39

ITEM 11. EXECUTIVE COMPENSATION.

The information required by this Part III, Item 11 is incorporated herein
by reference from the Company's definitive proxy statement for its annual
meeting of stockholders to be held on or about May 28, 1998, which is expected
to be filed with the Securities and Exchange Commission pursuant to Regulation
14A of the Securities Exchange Act of 1934 within 120 days after the end of the
Company's fiscal year covered by this report.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.

The information required by this Part III, Item 12 is incorporated herein
by reference from the Company's definitive proxy statement for its annual
meeting of stockholders to be held on or about May 28, 1998, which is expected
to be filed with the Securities and Exchange Commission pursuant to Regulation
14A of the Securities Exchange Act of 1934 within 120 days after the end of the
Company's fiscal year covered by this report.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.

The information required by this Part III, Item 13 is incorporated herein
by reference from the Company's definitive proxy statement for its annual
meeting of stockholders to be held on or about May 28, 1998, which is expected
to be filed with the Securities and Exchange Commission pursuant to Regulation
14A of the Securities Exchange Act of 1934 within 120 days after the end of the
Company's fiscal year covered by this report.

PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K.

(a) DOCUMENTS FILED AS PART OF THIS REPORT:

(1) FINANCIAL STATEMENTS

The following financial statements are included in Part II, Item 8 of
this Form 10-K:

Independent Auditors' Report

Statement of Income for the Year Ended December 31, 1997 and Statements
of Revenues, Direct Expenses and Identified Corporate Expenses Before
Interest and Taxes for the Year Ended December 31, 1996, the Two Months
Ended December 31, 1995 and the Year Ended October 31, 1995

Balance Sheets as of December 31, 1997 and 1996

Statement of Stockholders' Equity for the Year Ended December 31, 1997

Statement of Cash Flows for the Year Ended December 31, 1997

Notes to Financial Statements

(2) FINANCIAL STATEMENT SCHEDULES

The following financial statement schedule is filed herein:

Schedule II -- Valuation and Qualifying Accounts and Reserves

All other schedules are omitted because of the absence of the conditions
under which they are required.

(3) EXHIBITS

See Index to Exhibits filed herein.

(b) REPORTS ON FORM 8-K

The Company filed no reports on Form 8-K for the fourth quarter of the
Company's fiscal year ended December 31, 1997.

40
40

SIGNATURES

PURSUANT TO THE REQUIREMENTS OF SECTION 13 OR 15(D) OF THE SECURITIES
EXCHANGE ACT OF 1934, THE REGISTRANT HAS DULY CAUSED THIS REPORT TO BE SIGNED ON
ITS BEHALF BY THE UNDERSIGNED, THEREUNTO DULY AUTHORIZED.

CORE MATERIALS CORPORATION

By /s/ KENNETH M. SCHMELL

------------------------------------
Kenneth M. Schmell
General Manager and Acting Chief
Executive Officer

Date March , 1998

PURSUANT TO THE REQUIREMENTS OF THE SECURITIES EXCHANGE ACT OF 1934, THIS
REPORT HAS BEEN SIGNED BELOW BY THE FOLLOWING PERSONS ON BEHALF OF THE
REGISTRANT AND IN THE CAPACITIES AND ON THE DATES INDICATED:

<TABLE>
<CAPTION>
SIGNATURE TITLE DATE
--------- ----- ----
<C> <S> <C>

/s/ KENNETH M. SCHMELL General Manager and Acting Chief Executive March 30, 1998
- ------------------------------------------------ Officer
Kenneth M. Schmell

/s/ KEVIN L. BARNETT Vice President, Secretary, Treasurer and March 30, 1998
- ------------------------------------------------ Chief Financial Officer
Kevin L. Barnett

/s/ GERALD L. VOIROL Controller and Assistant Secretary March 30, 1998
- ------------------------------------------------
Gerald L. Voirol

* Director March 30, 1998
- ------------------------------------------------
Richard R. Conte

* Director March 30, 1998
- ------------------------------------------------
Ralph O. Hellmold

* Director March 30, 1998
- ------------------------------------------------
Thomas M. Hough

* Director March 30, 1998
- ------------------------------------------------
Malcolm M. Prine

* Director March 30, 1998
- ------------------------------------------------
Thomas E. Rigsby

*By /s/ KEVIN L. BARNETT Attorney-In-Fact March 30, 1998
-------------------------------------------
Kevin L. Barnett
</TABLE>

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41

CORE MATERIALS CORPORATION

SCHEDULE II

Valuation and qualifying accounts and reserves for the years ended December
31, 1997, and 1996.

Reserves deducted from asset to which it applies -- allowance for doubtful
accounts.

<TABLE>
<CAPTION>
ADDITIONS
----------------------
BALANCE AT CHARGED TO CHARGED TO
BEGINNING COSTS & OTHER DEDUCTIONS BALANCE AT
OF YEAR EXPENSES ACCOUNTS (A) END OF YEAR
---------- ---------- ---------- ---------- -----------
<S> <C> <C> <C> <C> <C>
Year Ended December 31, 1997............... -- $140,000 -- $7,000 $133,000
Year Ended December 31, 1996............... -- -- -- -- --
</TABLE>

(A) Amount represents uncollectable accounts written off.

42
42

INDEX TO EXHIBITS

<TABLE>
<CAPTION>
EXHIBIT NO. DESCRIPTION LOCATION
----------- ----------- --------
<S> <C> <C> <C>
2(a)(1) Asset Purchase Agreement dated as of September 12, Incorporated by reference to Exhibit
1996, as amended October 31, 1996, between Navistar 2-A to Registration Statement on Form
and RYMAC(1) S-4 (Registration No. 333-15809)
2(a)(2) Second Amendment to Asset Purchase Agreement dated Incorporated by reference to Exhibit
December 16, 1996(1) 2.1.1 to Annual Report on Form 10-K for
the year-ended December 31, 1996
2(b)(1) Agreement and Plan of Merger dated as of November Incorporated by reference to Exhibit
1, 1996, between Core Materials and RYMAC 2-B to Registration Statement on Form
S-4 (Registration No. 333-15809)
2(b)(2) First Amendment to Agreement and Plan of Merger Filed Herein
dated as of December 27, 1996 between Core
Materials and RYMAC
3(a)(1) Certificate of Incorporation of Core Materials Incorporated by reference to Exhibit
Corporation as filed with the Secretary of State of 4(a) to Registration Statement on Form
Delaware on October 8, 1996 S-8, (Registration No. 333-29203)
3(a)(2) Certificate of Amendment of Certificate of Incorporated by reference to Exhibit
Incorporation of Core Materials Corporation as 4(b) to Registration Statement on Form
filed with the Secretary of State of Delaware on S-8 (Registration No. 333- 29203)
November 6, 1996
3(a)(3) Certificate of Incorporation of Core Materials Incorporated by reference to Exhibit
Corporation, reflecting amendments through November 4(c) to Registration Statement on Form
6, 1996 [for purposes of compliance with Securities S-8 (Registration No. 333-29203)
and Exchange Commission filing requirements only]
3(b) By-Laws of Core Materials Corporation Incorporated by reference to Exhibit
3-C to Registration Statement on Form
S-4 (Registration No. 333-15809)
4(a)(1) Certificate of Incorporation of Core Materials Incorporated by reference to Exhibit
Corporation as filed with the Secretary of State of 4(a) to Registration Statement on Form
Delaware on October 8, 1996 S-8 (Registration No. 333-29203)
4(a)(2) Certificate of Amendment of Certificate of Incorporated by reference to Exhibit
Incorporation of Core Materials Corporation as 4(b) to Registration Statement on Form
filed with the Secretary of State of Delaware on S-8 (Registration No. 333- 29203)
November 6, 1996
4(a)(3) Certificate of Incorporation of Core Materials Incorporated by reference to Exhibit
Corporation, reflecting amendments through November 4(c) to Registration Statement on Form
6, 1996 [for purposes of compliance with Securities S-8 (Registration No. 333-29203)
and Exchange Commission filing requirements only]
</TABLE>

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43

<TABLE>
<CAPTION>
EXHIBIT NO. DESCRIPTION LOCATION
----------- ----------- --------
<S> <C> <C> <C>
4(b) By-Laws of Core Materials Corporation Incorporated by reference to Exhibit
3-C to Registration Statement on Form
S-4 (Registration No. 333-15809)
10(a)(1) Core Materials Corporation Secured Promissory Note Incorporated by reference to Exhibit
10.1 to Annual Report on Form 10-K for
the year-ended December 31, 1996
10(a)(2) Amendment No. 1 to Secured Promissory Note Incorporated by reference to Exhibit
10.1.1 to Annual Report on Form 10-K
for the year-ended December 31, 1996
10(b) Comprehensive Supply Agreement Incorporated by reference to Exhibit
10.2 to Annual Report on Form 10-K for
the year-ended December 31, 1996
10(c) Transitional Services Agreement Incorporated by reference to Exhibit
10.3 to Annual Report on Form 10-K for
the year-ended December 31, 1996
10(d) Registration Rights Agreement Incorporated by reference to Exhibit
10.4 to Annual Report on Form 10-K for
the year-ended December 31, 1996
10(e) Loan Agreement Filed Herein
10(f) Master Equipment Lease Agreement(2) Filed Herein
10(g) Long Term Equity Incentive Plan(3) Incorporated by reference to Exhibit
4(e) to Registration Statement on Form
S-8 (Registration No. 333-29203)
10(h) 1995 Stock Option Plan(3) Incorporated by reference to Exhibit
10.6 to Annual Report on Form 10-K for
the year-ended December 31, 1996
10(i) 1997 Informal Cash Profit Sharing Plan(3) Filed Herein
10(j) Letter Agreement Regarding Severance Pay to Richard Incorporated by reference to Exhibit
R. Conte(3) 10.7 to Annual Report on Form 10-K for
the year-ended December 31, 1996
10(k) Letter Agreement with Hellmold Associates, Inc. Incorporated by reference to Exhibit
dated November 1, 1995, as amended April 10, 1996 10.8 to Annual Report on Form 10-K for
and July 18, 1996(3) the year-ended December 31, 1996
10(l) Oral Compensation Agreement with Malcolm M. Incorporated by reference to Exhibit
Prine(3) 10.9 to Annual Report on Form 10-K for
the year-ended December 31, 1996
</TABLE>

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44

<TABLE>
<CAPTION>
EXHIBIT NO. DESCRIPTION LOCATION
----------- ----------- --------
<S> <C> <C>
11 Computation of Net Income per Share Exhibit 11 is omitted because the
required information is included in the
Notes to Financial Statements in Part II,
Item 8 of this Annual Report on Form 10-K

23 Consent of Independent Auditors Filed Herein

24 Powers of Attorney Filed Herein

27 Financial Data Schedule Filed Herein
</TABLE>

(1) The Asset Purchase Agreement, as filed with the Securities and Exchange
Commission at Exhibit 2-A to Registration Statement on Form S-4
(Registration No. 333-15809), omits the exhibits (including, the Buyer Note,
Special Warranty Deed, Supply Agreement, Registration Rights Agreement and
Transition Services Agreement, identified in the Asset Purchase Agreement)
and schedules (including, those identified in Sections 1, 3, 4, 5, 6, 8 and
30 of the Asset Purchase Agreement. The Company will provide any omitted
exhibit or schedule to the Securities and Exchange Commission upon request.

(2) The Master Equipment Lease, as filed in the Exhibits to this Annual Report
on Form 10-K, omits certain schedules (including, addendum to the schedules)
which separately identify equipment subject to the Master Equipment Lease
and certain additional terms applicable to the lease of such equipment. New
schedules may be added under the terms of the Master Equipment Lease from
time to time and existing schedules may change. The Company will provide any
omitted schedule to the Securities and Exchange Commission upon request.

(3) Indicates management contracts or compensatory plans that are required to be
filed as an exhibit to this Annual Report on Form 10-K.

45