I have a 2003 Winnebago on a Spartan chassis. A couple of years ago, I emailed Accuride with info from my wheels to find out whether or not they are clear coated. Info stamped into the outside duals includes the following info "120psi maximum cold pressure - 28844 AIP - 22.5 x 7.50 - ACCURIDE U.S.A. 9257."
An Accuride rep called me to make sure I got the right into. Based on the info stamped on my wheels, he said they are not coated. He said they did not begin making coated wheels until about 2005. Also, if coated, they would have a sticker indicating "ACCU-SHIELD" and the stamped letters "AIP" would
be "AIPC". For polish he recommended Bush Enterpirses kit 64028 at www.buschshineproducts.com. I still haven't got around to trying any polish as yet...