I have inherited a Hearthstone Tucson , 2004 vintage , with brown porcelain or enamel paint ...the top has several areas that are dull , cloudy, splotchy , etc ... I have tried several cleaning products , light rubbing compound , etc with no luck ...don't know what paint they used , and get no info so far from the factory ( they do sell a porcelain touch up bottle)...I don't want to repaint if possible ... any thoughts about wet sanding with 2000 ? or any other ideas ?