aluminum... will always corrode/oxidize. its a soft metal. if it has a clear coat on it, you could probably sand it off with a d.a. sander and some 600 and then 800 grit sand paper. you could aslo get the clear coat remover from busch enterprises. clear coat remover. either way, you need to keep up on aluminum, take it from a truck driver. you can then polish it with a liquid polish, such as california customs purple polish and a soft pad similar to buffing paint on a car, or use a buffing wheel, and rouge, which you can also find on the busch site. it will all depend on how bad the aluminum is. if it needs to be cut down a lot due to scraches and pitting youd be better off buffing on it with rouge. if you just need to get the oxidation off of it purple or any liquid aluminum polish would work for that matter.