Re: Beige Apple IIgs

[Jon Camp <jac@silvercity.mv.com>]

I've bought a GS or two that was experiencing the same sort of 
yellowing you describe.  In extreme cases I've pulled out the 
mother board, power supply and speaker and  scrubbled it down 
with a "soft" abrasive pad (the kind with a sponge on one side 
and a white scrub material on the reverse) and a solution of 
clorox cleanup and warm water.  It does a super job of removing 
ALL of the discoloration.  Simply avoid scrubbing, or be very 
careful, around the apple logo and IIGS script on the front of 
the case.  If you let the sloution remain on the case for a few 
minutes before rinsing, you'll have far less scrubbing to do.
the same method works well for platinum IIe's too.
You can use an old stiff bristle tooth brush, dipped in the 
solution, to clean the ventilation grooves on the top of the 
case.
I then rinse them thoroughly with warm water and "dust" out the 
water with compressed air and dry them overnight.  Evidently, 
many types of plastics react with time and oxidation.  I was told 
that gas or oil heat used in a building with certain types of 
plasitcs can speed up this discoloration, something to do with 
the sulphur content I believe. (for what that's worth!)

                          Jon Camp