Try to find out what type of plastic the case is made of, and whether there is any surface layer applied to the plastic after it is molded. If the case is simply molded plastic, minor surface flaws can be polished out using Meguiars plastic polish. The damage could be abrasive rather than from a solvent.

Here are some notes from the old forums (I fixed the URL):

From: http://www.macfixit.com/ultimate/Forum1/HTML/003845.html

posted 04-16-2000 07:31 PM The Meguiar's plastic polish has a new part number and packaging. The old designation was MGH-10 Mirror Glaze Plastic Polish, which meets specs MIL-C-5547 and MIL-C-18767A(ASG). This is to be the product shown at http://www.meguiarsdirect.com/detail/MEG+M1008 . The part number is 1008. (for #10, 8 ounces)

You do not need to polish first with M-1708 unless the scratch is really rough. Meguiar’s M-1008 and M-1708 are what are called chemical rather than physical abrasives. They are claimed to have no effective grit size, and to work by chemically breaking down a microscopically-thin layer of plastic. Tech support did not explain why rubbing is still necessary (Nov. 24, 2000).


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