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<p>[QUOTE=&quot;wolves69, post: 185647, member: 7322&quot;]Just my humble opinion...</p><p><br /></p><p>Nickel is a pretty stable metal.&nbsp; I&#039;ve experimented alot with toned nickels, and haven&#039;t found anything non-destructive to remove the black/brown on nickels.&nbsp; As for olive oil, I doubt if that would do anything really damaging, but then again, without seeing the coin anything could happen.[/QUOTE]</p><p><br /></p>

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