he rhinestones are probably ruined, most are made of lucite or acrylic and will have a chemical reaction to the clear spray paint. You could try nail polish remover on a small spot, but I think its ruined

why do you have a rhinestone license plate cover anyways? sounds super tacky

Angle grinder and blow torch

It could be done, but it would be better to just get another frame if you consider the time involved as long as you didn't spend over $20 for the frame.

So I bought a rhinestone license plate frame. I had the bright idea to spray a clear coat of spray paint over it to seal in the rhinestones, in hopes to make them last longer, you know kinda like a top coat for nail polish? Well that was a fail, because the spray paint dulled out the rhinestones very badly. Now I was wondering if there is any way for me to reverse the damage? Please help?!