Any tips on how to recondition rubber trim that is etched with spots that look like mold or acid rain etching. I have tried all kinds of APC`s, vinegar , clorox etc and none of these would remove it. The only thing that seems to work is multiple Acetone scrubs with a microfiber cloth. I am a little leary of the Acetone as I know it is a very potent chemical. Is it ok to use Acetone and will it permanently damage rubber or paint? I am open to any suggestions. Thanks