I used Goo Gone on my windshield to get rid of the residue from my old emissions stickers--it was the only thing that would get rid of it...still kind of a pain in the butt though...give it a try pretty cheap anyway.
Try 3M Adhesive Remover - very sparingly!!! It removes adhesive, paint overspray and tar. Do not rub hard, but go over several times instead. Good Luck!
yeah i got it off. i was afraid to use goof off or goo gone cause they were very strong and i thought it would take off the paint. so i scrubed with simple green and the polished and waxed with a buffer. took all do to so.