First off, use a liquid polish not a paste. The paste types take twice as long. Secondly, if I were you, I would go to a local good-size truckstop. They tend to have the best stuff. I've been polishing wheels and tanks since I was a kid. I can polish all my wheels and tanks in about 2 hours with a good liquid polish. I can't really give a certain brand because some brands aren't sold all over the country. Hope this helps.
kager