I tried nail polish remover(acetone) paint thinner/mineral spirits, and lacquer thinner. Lacquer thinner seemed to do the best job , evaporated quickly enough not to soften the plastic but left the plastic dull. I used some rubbing compound to bring it back and it turned out not to bad, some more buffing with finer grade compound and I think it will be almost as good as new ,maybe 75 to 80% shine