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<p>[QUOTE="GDJMSP, post: 492870, member: 112"]Fingerprints, if placed on a coin more than few days ago (and even that may be too long) cannot be removed. The oil in your skin that creates the fingerprint contains a mild acid. This acid actually eats into the surface of the coin. It's just as if you took a sharp pointed metal object and carved your fingerprint into the metal. That's why fingferprints cannot be removed.</p><p><br /></p><p>Now, if the acid on your fingers is harsh enough to actually eat into the metal of the coin - just imagine what vinegar, ketchup, hot sauce, lemon juice or anything of the kind can do to a coin.[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 492870, member: 112"]Fingerprints, if placed on a coin more than few days ago (and even that may be too long) cannot be removed. The oil in your skin that creates the fingerprint contains a mild acid. This acid actually eats into the surface of the coin. It's just as if you took a sharp pointed metal object and carved your fingerprint into the metal. That's why fingferprints cannot be removed. Now, if the acid on your fingers is harsh enough to actually eat into the metal of the coin - just imagine what vinegar, ketchup, hot sauce, lemon juice or anything of the kind can do to a coin.[/QUOTE]
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