Clark, I lived in Hawaii for 12 years and was in the motorcycle business. We constantly struggled with corrosion on aluminum parts on bikes. We quickly found that polishing aluminum was something that shouldn't be done. There was nothing we could do to protect the alu parts from further and quicker corrosion after polishing other than repeated and frequent polishings. Couple that with the acidic volcanic red dirt you have surrounding you, raw alu parts are at a huge disadvantage. IMO polishing hubs and rims is a huge amount of work for very little reward.