+++1 on the Meguiars, they make a range of polish/rubbing compound products (http://www.meguiarsdirect.com/produc...or_glaze_page2) that I have used on my Trek 7.5FX (painted aluminum), automobiles with poly finishes, and guitars with poly, and lacquer finishes. The Swirl Remover, a final polish and some elbow grease are all you usually need. Just clean with water between product grades. If need be you can use their Fine or Medium cut cleaner first, just remember to follow with the swirl remover, and wax. On my Trek I had to remove stains left behind from Yakima rack straps - it's now smoother than new. I first read about them in a guitar magazine, one of the top guitar repair techs swears by them.