When I placed my order for some Classics, John (owner) said to pick up White Diamond Metal Polish. Used it for on my old wheels, my Borla Exhaust and I use it on my Classics. This thing is awesome, I apply it on my wheels with a power ball and wipe off with a MF towel.
I wash my car and wheels 4 - 6 times a month and I dont let the car accumilate dirt/dust/grime.