Use Mothers Mag & Aluminum Polish perfect for all metals and I recommend for cleaning any exhauts tip. Can be purchase @ your local auto store for 3 or 4 bucks.okwiater said:My tip is looking dirty from dirty water and stuff. I'm wanting to give it a proper cleaning and polishing, but what should I use on it? Chrome polish? Just using water and car wash fluid doesn't give it the bright shiny look it used to have. Thanks!