Two great resources:
http://www.raydobbins.com/polishing/
http://www.caswellplating.com/buffs/buffman.htm

There is also an in depth discussion on a BMX site, that escapes my mind at the moment.
FWIW, I only polish and buff as a last resort. If the anodizing is shot, or the part is deeply scratched, then I bring out the wheel.