Re: polishing valve cover (JG Luder)
ah ha! I remember now! Aircraft remover, yes it actually says that, (WalMart)... garanteed to rid your yard of 747s and get the paint off your valve cover. Only use 800-1500, and even 2000 if you have patience. Lower grit than that and you'll scar the metal.
A polishing wheel with some good hard compound is a must. Sears can help you out in this area.