So let me get this straight - Heavy, pure unfiltered exposure to sun will turn plastics back to white, yet intermittent less powerful sun rays such as shining through windows onto your Amiga desk in the morning will turn them yellow? And too much exposure will actually cause them to go brittle (even if they do turn white)? It's all a bit confusing.
Some plastics turn yellow with age anyway right? I have this gel mousepad and the white plastic has turned yellow about 33% I believe from what it used to be yet it has never had any sunrays on it whatsoever.
So, that mouse for example...it looks much better now. How do you stop it returning yellow again? And from what I've read, any treatment will mean a return of the yellow much sooner than it normally would in getting there in the first place? Also, isn't they yellow just on the surface and not below it? I'm sure it rubs off with a bit of abrasive cleaning but at the cost of ruining the textured surface. I have a very yellowed Archimedes mouse so I do have an interest here.