I guess I'm gonna talk a bit about the vintage computers I have accumulated over the years, what I have and haven't (yet) done to them, and maybe some extra info?
We'll see what sticks.
Commodore Amiga 500. Despite all the jokes that we at @dosgameclub all hate #Amigas, most of us actually love them. This isn't the only Amiga I own, but the only one I have put any work into.
The case only needed a good cleaning, there was hardly any yellowing and clearly not enough to risk another retrobrighting disaster as with the ST though I read afterwards that the grey plastic used in #Ataris and early #Macs is prone to this marbling effect and that beige plastic is less problematic.
@rnlf @dosgameclub Very nice machine, I'm currently retrobrighting Atari 1040ST and have a marbling effect all over the case, still fighting with that :)
@josipretrobits Ugh, yeah. I had the same (https://dosgame.club/@rnlf/108206091229107930). Nothing I tried got rid of it. I think the chemicals in that plastic are unevenly mixed and take differently to retrobrighting.
I hope you have more luck getting yours too look nice again than I had.
@josipretrobits I guess everybody has to ruin at least one machine with retrobright before we understand that we should be super careful with it.