It's a *****. Been there a few times. The " brown compound" , should be the general working compound , to get a general polish. The Wenol is a damn site better, than jeweler's rouge. ( J.M.O....) Try stripping Porsche wheels, of their silver anodizing. Easy low buck trick, was easy off . Works sometimes, not this time. I spent more money wet sanding uniformly, (beer and wet/ dry sandpaper...) than it was worth. Hey, you learn....