Most of these solutions seem to be related to boot marks or melted rain gear/plastic. What I have a problem with is those little black spots of asphalt that burn on to the mufflers after a road trip. They cover the entire mufflers and are baked on hard as a rock! I can find any solvent that will dissolve them! I don't want to rub on them because experience has taught me that rubbing removes the chrome plating along with the spots. Anyone find a product or procedure that takes them off with out damaging the chrome plating?
You have to look into this yourself..... I Have Never needed to use it , But a friend of mine uses XYLENE to get tar and
asphalt off his bikes and truck(they paved a new road that he travels) He swears by it! Read up on it,it's very potent
I would try WD-40 first
GOOD LUCK AND DO SOME RESEARCH