Hi there, this is a question for anybody! My son and I are in the process of repainting his 1985 Porshe 944. Currently we are taking apart the car and repairing small rust spots. At the botton along the rocker and in front of the rear wheels Porshe applied some sort of chip resistant material. Part of it looks like major orange peel and the part near the rear wheel was smooth. We used a heat gun to soften and scrape away most of the material but the adhesive remains. We have tried 3M Adhesive remover and plain old lacquer thinner with little success. Anybody have any ideas?