I have painted my hood for my 1957 chevy (black paint). I wet sanded it. It looked good. I buffed it out and have a lot of swirl marks. I used medium cut buffing compound first, then fine cut buffing compound second, then swirl mark remover and I can't get the swirl marks out. My question is = if I sand it and reclear coat it - do I have to sand all the way to the base paint to get rid of the swirl marks?