did you polish it by hand or use the powerball?[/b]
By hand, don't have a powerball and the powerball may be to big. There was a couple of spots where there was aluminum weld spatter and I just took 1200 sand paper and smoothed it before polishing it.
To bad the cast aluminum wouldn't polish up like that.
Appearantly there is no coating put on from the factory to keep the aluminum from corroding so I'm going to spray some kinda of clear or something to try and protect it. Bare aluminum will look terrible in no time after riding around the dunes by salt water.