I had the rear hatchback window on my Mustang broken a few months back when someone broke into my car. I just got it replaced yesterday finally, but I have a whole bunch of nasty adhesive left over from the tape I used to make a plastic window. It seems to come off with ordinary bug and tar remover, but very very slowly. I have some acetone, and I'm sure it will work better...but I am thinking it will take the paint and/or the clearcoat off as well. Anyone have any experience with body work? *Update* WD-40 did the trick.