My favorite polishes are Xtreme, Mothers Billet and the pink Metal Wax. I've used pro's that weren't very good and some that are great. Currently, if I feel like spending the cash I use Benson Metal Polishing. I first tried them because of a Billy B referral. The owner used to work at IMCO and I can't match his quality with my off the shelf products.

Benson Metal Polishing
934 Monte Vista Ave, Upland, CA 91786
(909) 946-2113