A propane torch works well (with care) on thick stuff without overheating the metal. It will crumble away with a little persuasion from a putty knife. A 36 grit disc will clean the rest.
Yeah, most of this car is okay..... however i do have to put a HUGE patch in the roof where someone in the 70's or 80's put one of those JC whitney sun roofs in :angry7:
