I did a frame on full restoration due to lack of ability to rotisserie the car and used a combinaton of putty knives, wood chisels, and a heat gun, all from under the car...nasty doesn't begin to describe the job but 30 years ago it was no big deal...mineral spirits in a pressurized air stream works but gets messy...the car won 9 super chevys and every world of wheels it was invited to...cover the floor with 6 mil visqueen, you'll thank me...