On: How plastic can rust, sort of

[everdrive]

I've only heard of retr0bright in this regard. SNES consoles are pretty famous for yellowing at different rates. As other commenters have stated, sunlight degrades plastic. It may perform some whitening, but you're damaging the old electronics.

https://www.retr0bright.com/make.html

[rowanG077 → everdrive]

I don't think you are supposed to apply it to the electronics. Only the plastics.