FREE: Coins

Although this coin is pretty much wrecked, and has low numismatic because of that, you should never attempt to clean a coin. Even something that appears to leave it shiny and neat can leave microscopic scratches across the surface that severely devalue the coin. Some chemicals will even strip layers off the coin. Try putting an old penny on ketchup, the acidity of it will literally rip off layers of the coin, leaving it looking more like it's original color, but dull and pitted.