Yes. But the trouble is finding them once placed, since they tend to blend in with the aged plastic.
Retrobrighting, to the rescue!
I've retrobrighted my Mac SE case/mouse/keyboard/external drive, and Apple IIGS keyboard.. they all turned out fairly well. The Mac case was particularly bad, it took several tries over a few days. Had a blacklight and mirrors to work with. Next time I'll wait until summer and do it in the sun.
“retro recipes”’and “the 8-bit guy” on Jootube have great videos showing different techniques.
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