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<p>[QUOTE=&quot;cladking, post: 4563394, member: 68&quot;]There are many ways to do it and it usually has the most dramatic effect on old copper; especially old copper that has been exposed to cigarette smoke.&nbsp; The easiest and fastest is to just use body oil as from your forehead on your thumb and work it into the coin.&nbsp; It will lift off most dirt and especially tars and make the coin look more natural.&nbsp; To my knowledge there is &quot;no&quot; long term damage.&nbsp;&nbsp; There can be hidden spots or stains revealed so take a close look first.&nbsp; Sometimes you&#039;ll find major problems like tiny holes or putty.&nbsp; </p><p><br /></p><p>It works on all metals but best on copper.&nbsp;&nbsp; </p><p><br /></p><p>Only use this when appropriate and never on uncirculated coins.&nbsp;&nbsp; Avoid doing it on coins with luster.&nbsp; Generally if a coin doesn&#039;t have a layer of something on it then this won&#039;t help.&nbsp; Sometimes with copper you&#039;ll uncover more serious accumulations that require a soak in olive oil.&nbsp;&nbsp; I prefer to avoid olive oil since it requires a lot of work to make the coin look natural again.[/QUOTE]</p><p><br /></p>

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