it's better to strip, but yes you can, probably best to use a primer/sealer if painting, clearcoat is harder to say what would be compatible directly over the pc, might need a test spot... adhesion is a bit more difficult on powdercoat & usually needs to be sanded well, too much to just be cleared I think, if you just wet sanded it with like 1,000 & cleared it it would probably work but would chip really easy
it's always better to remove it though if you can