You can go to just about any decent truck stop and find big bars of jewlers rouge. It comes in different colors.. Brown; for serious cutting of abused or never cut aluminum, Green; for general everyday type polishing (use it after the brown). Most people stop here with the green but if you really want a mirror finish there is White; for a fine finish mirror like finish. It's for serious polishing.. For a bit less serious, there are more agressive polishes than the Mothers & Never Dull... I use Zepher, white Diamond, and some others found in truck stops.. Try these!
But, if you want to avoid all the mess and everything.. there are usually detail shops in some big truck stops that can do anything.. (Where are you and i can steer you to somewhere that there is a detail shop..) If you see a "Blue Beacon" truck wash they can usually steer you in the right direction of some polishing shop.. They can just apply acid to the aluminum to get the oxidation off.
Scott, Suzanne, & Sheba (German Shepard <long hair)..
2011 Dodge Ram 3500 Long Horn, DRW, longbed, 4x4, 4:10rear, pullrite 25.5K hitch.
Shopping for that just right 5th wheel..