Raw aluminum is delicate so for cleaning stick to a pH neutral car soap and water as much as possible. Even very gentle wheel cleaners can be hard on softer aluminums like 6160 billet.
As far as polishing, use a product designed for high quality aluminum... there are some out there that have abrasives in them... to effectively polish raw aluminum you don't need gritty polish. Most of the polishing is accomplished thru chemical oxidation of the surface and very fine abrasives. Ours is a 2 stage and produces some pretty staggering results:
Adam's Metal Polish 1 & 2 Combo
Once they're looking the way you want any wax or sealant will be fine to use for protection.