I was cleaning my nails with nail polish remover(isopropyl acetone, methyl ethyl ketone, and n-methyl-pyrrolidone) and I touched my computer and I saw a white stain so I tried to take it off with all-purpose cleaner but that did not work so I look at my computer and I see the whiteness so how can I remove it.
It is not just a stain that could be cleaned off by dissolving or fine brushing by a wipe. The plastic is already damaged.
I see only few ways, none really good :
Colour the spots by some colour ( markers ? ) to be as least disturbing as possible.
Peel off the damaged spots to the undamaged layers, but the original surface texture would be lost, so the result may not be better..
If it is a free, not functional surface, put there some decoration stick label.