Easy Off oven cleaner, followed by a good bath, courtesy of the power washer or car wash...that stuff will peel the chrome off a trailer hitch ball.
To keep the factory sheen, after the clean, you can clear-coat it with a low-sheen coating. Eastwood and several other paint suppliers sell this product.
Last edited by 4-5-6 Chevy Trucks; 12/04/2008 8:22 AM.