Yellow To White

[Holley]

'cause of the way the letters are applied to the keys it'd have to be a mild bleach (ie. mix with a good amount of water ;-)).  If you wanted to paint it a quick bleach & rinse would help the paint stick anyway - be careful not to get fingerprints on after washing as the paint won't stick as well.

If done right pain will last ages :-) You could always do it in a cammo pattern, as a friend once did with his C64 - looked very cool!

[Holley]

Trouble is it's actually the plastic thats changed colour, not got dirty.  Bleach can turn biological materials white, and clear it off like nothing else (hence it's good to use before painting).  The Acetone will, as stated, actually remove the top layer ...

Aaanyway, for paint use a satin finish rather than matt - matt looks horrible when the everyday muck sticks to it, and it won't just wipe clean.  Use car paint rather than Plasticote, as that stuff goes wierd over time ... if you wanted to do a pattern, why not red & white checkers? :-D

Good luck with the cleaning!