anytime i overhear someone saying that they need to have the wedding/class/whatever ring polished, I advise them not to because you do lose material in that process (that the jewelers actually DO collect) then I'll ask if i can borrow it for a few moments, grab my special "NEVER use this on people" toothbrush and disappear into the bathroom, 2 minutes later, shiny ring. (and minty fresh)