EXHIBIT 99.2
 
                         NOTICE OF GUARANTEED DELIVERY
                                      FOR
             10 3/4% SENIOR SUBORDINATED NOTES DUE OCTOBER 1, 2006
                                       OF
                       COMMONWEALTH ALUMINUM CORPORATION
 
   
    As set forth in the Prospectus, dated October 22, 1996 (the "Prospectus"),
of Commonwealth Aluminum Corporation (the "Company"), in the accompanying Letter
of Transmittal and instructions thereto (the "Letter of Transmittal"), this form
or one substantially equivalent hereto must be used to accept the Company's
exchange offer (the "Exchange Offer") to purchase all of its outstanding 10 3/4%
Senior Subordinated Notes Due October 1, 2006 (the "Old Notes") if (i)
certificates representing the Old Notes to be tendered for purchase and payment
are not lost but are not immediately available, (ii) time will not permit the
Letter of Transmittal, certificates representing such Old Notes or other
required documents to reach the Exchange Agent prior to the Expiration Date or
(iii) the procedures for book-entry transfer cannot be completed prior to the
Expiration Date. This form may be delivered by an Eligible Institution by mail
or hand delivery or transmitted, via telegram, telex or facsimile, to the
Exchange Agent as set forth below. All capitalized terms used herein but not
defined herein shall have the meanings ascribed to them in the Prospectus.
    
 
   
      THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON
  NOVEMBER 21, 1996 UNLESS THE OFFER IS EXTENDED (THE "EXPIRATION DATE").
  TENDERS OF OLD NOTES MAY BE WITHDRAWN AT ANY TIME PRIOR TO 5:00 P.M. ON THE
  BUSINESS DAY PRIOR TO THE EXPIRATION DATE.
    
 
                              THE EXCHANGE AGENT:
 
                         HARRIS TRUST AND SAVINGS BANK
 

                                                       
              BY MAIL:                    BY FACSIMILE:         BY HAND OR OVERNIGHT COURIER:
 
   Harris Trust and Savings Bank         (212) 701-7636         Harris Trust and Savings Bank
c/o Harris Trust Company of New York  CONFIRM BY TELEPHONE:  c/o Harris Trust Company of New York
           P.O. Box 1010                 (212) 701-7624                77 Water Street
        Wall Street Station                                               4th Floor
         New York, NY 10268                                           New York, NY 10004
      Attention: Mark Zimkind                                      Attention: Mark Zimkind

 
    DELIVERY OF THIS INSTRUMENT TO AN ADDRESS, OR TRANSMISSION VIA TELEGRAM,
TELEX OR FACSIMILE, OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID
DELIVERY.
 
    This form is not to be used to guarantee signatures. If a signature on the
Letter of Transmittal is required to be guaranteed by an "Eligible Institution"
under the instructions thereto, such signature guarantee must appear in the
applicable space provided in the signature box on the Letter of Transmittal.
 
Ladies and Gentlemen:
 
    The undersigned hereby tender(s) to the Company, upon the terms and subject
to the conditions set forth in the Exchange Offer and the Letter of Transmittal,
receipt of which is hereby acknowledged, the aggregate principal amount of Old
Notes set forth below pursuant to the guaranteed delivery procedures set forth
in the Prospectus.
 
    The undersigned understands that tenders of Old Notes will be accepted only
in principal amounts equal to $1,000 or integral multiples thereof. The
undersigned understands that tenders of Old Notes pursuant to the Exchange Offer
may not be withdrawn after 5:00 p.m., New York City time on the Business Day
prior to the Expiration Date. Tenders of Old Notes may also be withdrawn if the
Exchange Offer is terminated without any such Old Notes being purchased
thereunder or as otherwise provided in the Prospectus.
 
    All authority herein conferred or agreed to be conferred by this Notice of
Guaranteed Delivery shall survive the death or incapacity of the undersigned and
every obligation of the undersigned under this Notice of Guaranteed Delivery
shall be binding upon the heirs, personal representatives, executors,
administrators, successors, assigns, trustees in bankruptcy and other legal
representatives of the undersigned.

                            PLEASE SIGN AND COMPLETE
 

                                               
Signature(s) of Registered Owner(s) or            Name(s) of Registered Holder(s):
Authorized                                        ------------------------------------------------
Signatory:                                        ------------------------------------------------
- --------------------------------------            ------------------------------------------------
- ------------------------------------------------
- ------------------------------------------------
Principal Amount of Old Notes Tendered:           Address: ---------------------------------------
- ----------                                        ------------------------------------------------
- ------------------------------------------------
Certificate No(s). of Old Notes (if available):   Area Code and Telephone No.: -------------------
- -------
- ------------------------------------------------  If Old Notes will be delivered by book-entry
- ------------------------------------------------  transfer at The Depository Trust Company,
Date: ------------------------------------------  insert, Depository Account No.:
                                                  -----------------------------------

 
This Notice of Guaranteed Delivery must be signed by the registered holder(s) of
Old Notes exactly as its (their) name(s) appear on certificates for Old Notes or
on a security position listing as the owner of Old Notes, or by person(s)
authorized to become registered Holder(s) by endorsements and documents
transmitted with this Notice of Guaranteed Delivery. If signature is by a
trustee, executor, administrator, guardian, attorney-in-fact, officer or other
person acting in a fiduciary or representative capacity, such person must
provide the following information.
 
                      Please print name(s) and address(es)
 
Name(s):
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
Capacity:
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
Address(es):
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
Do not send Old Notes with this form. Notes should be sent to the Exchange Agent
together with a properly completed and duly executed Letter of Transmittal.
 
                                   GUARANTEE
                    (NOT TO BE USED FOR SIGNATURE GUARANTEE)
 
    The undersigned, a member firm of a registered national securities exchange
or of the National Association of Securities Dealers, Inc. or a commercial bank
or trust company having an office or a correspondent in the United States,
hereby (a) represents that each holder of Old Notes on whose behalf this tender
is being made "own(s)" the Old Notes covered hereby within the meaning of Rule
14e-4 under the Securities Exchange Act of 1934, as amended, (b) represents that
such tender of Old Notes complies with such Rule 14e-4, and (c) guarantees that,
within five New York Stock Exchange trading days from the date of this Notice of
Guaranteed Delivery, a properly completed and duly executed Letter of
Transmittal (or a facsimile thereof), together with certificates representing
the Old Notes covered hereby in proper form for transfer (or confirmation of the
book-entry transfer of such Old Notes into the Exchange Agent's account at The
Depository Trust Company, pursuant to the procedure for book-entry transfer set
forth in the Prospectus) and required documents will be deposited by the
undersigned with the Exchange Agent.
 
    THE UNDERSIGNED ACKNOWLEDGES THAT IT MUST DELIVER THE LETTER OF TRANSMITTAL
AND OLD NOTES TENDERED HEREBY TO THE EXCHANGE AGENT WITHIN THE TIME PERIOD SET
FORTH ABOVE AND THAT FAILURE TO DO SO COULD RESULT IN FINANCIAL LOSS TO THE
UNDERSIGNED.
 

                                               
Name of Firm: ---------------------------------   ------------------------------------------------
                                                                Authorized Signature
Address: ---------------------------------------  Name: -----------------------------------------
- ------------------------------------------------  Title:
                                                  ------------------------------------------
Area Code and Telephone No.: -------------------  Date: ------------------------------------------