Hey, my friend and I are fixing up an old 1976 H16 and we really wanted to replace the non-skid rubber/neoprene/stock black stuff on the siderails with something fresher or new because it looks disgusting, but the part of it thats left is really hard to remove. Peeling it goes very slowly, and using a chisel or other similar scraper object just scratches the metal, which we aren't looking to do. Any suggestions?