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<p>[QUOTE=&quot;vintagemintage, post: 26787939, member: 75988&quot;]A very nice Accented Hair specimen. I&#039;m a long time Kennedy Half collector, maybe you can tell by my avatar!</p><p>Finger skin oil residue can remain on a coin&#039;s surface indefinitely, altering the ongoing reaction of surface oxidation over time, in the shape of a fingerprint. Once this appears, it&#039;s difficult and likely harmful to remove, especially on a proof.</p><p>A careful acetone rinse can dissolve and remove harmful contaminants safely, just don&#039;t do anything abrasive during the process.[/QUOTE]</p><p><br /></p>

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