The other day I did a black Cadilac STS. This car was getting just a "used car treatment". I buffed it with Megs 80 and a rotary , then I applied a coat of PWC. I though that it looked very good , and then today I applied a coat of EX. The improvement was outstandind, the EX filled in some fine scratches that the buffing didnt remone, and the depth of shine was super. I know some people follow with Natty for a higher gloss , but after seeing what Ex does I dont think that it would be necessary.