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<p>[QUOTE=&quot;GDJMSP, post: 691185, member: 112&quot;]There have been several articles in the coin mags about exactly that. The mint even had to delay the release of the sets because the cents were getting discolored. They went to extreme lengths to try and prevent this. They finally came up with a coating, can&#039;t remember exactly what kind of coating it was but it was an anti-tanishing agent, that they put on all the coins. It was hoped that this anti-tarnishing agent would work.</p><p><br /></p><p>Sounds like it was less than 100% successful.[/QUOTE]</p><p><br /></p>

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