for all of you that havent used the por 15 the product line , it is really great . If you ever need to polish a valve cover or a SU carb you will not believe how fast and how good the Por 15 Artisan metal polish works . the stuff will amaizzzzzzz e ya on aluminum wheels . I dont have any ties to the Co. but just want to pass on a good thing. There is a dist. in Eugene , Or 541 345- 8092 I polished my valve cover to look like chrome , by hand in 30 min. !!! try it you will like it Gary Portland Ore.