Don't make the mistake of confusing it with Goddard's Silver 'Polish,' as I know some have!Even if you don't like fully dipped coins (which I don't), it can be a miracle worker on an 'uncomfortable' blemish if carefully used! 'Dunk' a dozen scrap coins beside a running tap, then stroke a few others with the tip of a dipped cotton bud, all beside running water, of course, and using seconds as your timescale, you'll find yourself a fair tool I'd say! I have used it in the past to reverse things I wish had never happened to a coin; stains, prints, poor storage, etc. I feel pretty comfortable with that!