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<p>[QUOTE=&quot;rzage, post: 1672140, member: 14070&quot;]I&#039;m with Kirkuleez on this . Copper is highly reactive and the only 2 ways to remove toning , (which is part of the coins surface) is to remove&nbsp; the top layer of the coins surface . Dipping will result in a color that is nothing like it was predipped . Also abrasives work , but then you will remove all the luster and have a dead looking coin with scratches . It&#039;s best to leave it alone . You can try NCS , but they might look at your coin decide there is nothing they can do and then you&#039;re out your conservation fee . That&#039;s a choice only you can make . A lot of people like the look of colorful toned copper me included . If you really don&#039;t like them , you can try to sell them . I hope you&#039;re wrong that the toning was done with heat because if it was they have lost a lot of their value .[/QUOTE]</p><p><br /></p>

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