Floni-I think the paint over the body, whether it be plastic, aluminum or steel makes the biggest difference as to how polishes and waxes will react. This car obviously has a modern paint job, but I detailed a 57 Edsel once, and it had a majority of the original paint. The main issue with that is the paints then had lead in them and were much harder. Definately had to really work the paint with some aggressive compounds to bring it back.