I have in my possession a stack (like 7 or 8) DELL P60 desktop computers. Unfortunately some idiot (cough, me, cough) thought it was a good idea (about 15+ years ago) to spray paint them all black. Now I can repaint the metal cases easy enough, but the plastic 'face plates' on the front of the computers have a nice coat of black paint all over them. They don't look bad, but I would like to see if I can chemically strip the paint from the plastic, without doing damage to the actual plastic. Is this achievable or have I (in the shortsightedness of my youth) defaced them irreparably?
In a recent video, RetroManCave demonstrates stripping the paint off a plastic TRS-80 case using methylated spirits. This will remove all the paint, thus affording you the option to leave the plastic in its "native" color, or prep and paint it to try to match the original color. I don't know whether a shorter treatment with the same chemical would remove just the outer layer of spray paint, but that may be worth a try.
Oven cleaner is one recommendation from various modellers, I've had decent luck with non-acetone nail varnish remover in the past (although depending on the paint type you might want something with acetone). Brake fluid is another suggestion I've seen.
All of these could damage the plastic.
This thread has some suggestions you might want to look at. https://www.tapatalk.com/groups/airfixtributeforum/paint-removal-t3088.html
As always protect your skin and eyes in particular when working with chemicals.