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<p>[QUOTE=&quot;johnmilton, post: 3506887, member: 101855&quot;]The term “cleaning” implies that the metal on the surface of a coin has been moved. This includes polishing, which has been done to a light extent here, surface hairlines, which a small thin scratches and whizzing, which going of the piece with a fine wire brush. Whizzing creates a false luster which bears a resemblance to mint luster. </p><p><br /></p><p>Mint luster is created when the coin is struck. The metal flows during instant the coin is made. It creates a surface that plays with the light when an Uncirculated or choice AU is swirled under a light. It can be something like a “cartwheel.” On mint luster is disturbed on a coin, it cannot be restored. </p><p><br /></p><p>It’s okay to remove dirt and the like from a coin, but you must take care not to disturb the underlying surface. You must also make sure that whatever agent you might have used in the removal process is rinsed off completely.[/QUOTE]</p><p><br /></p>

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