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<p>[QUOTE=&quot;-jeffB, post: 2781856, member: 27832&quot;]Welcome to CoinTalk!</p><p><br /></p><p>First, <b>stop rubbing with a paper towel</b>. Yes, that&#039;s guaranteed to ruin any coin that isn&#039;t already ruined. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" /></p><p><br /></p><p>Second, since radiator fluid is water-soluble, soak the coins in distilled water. This <i>may</i> do the trick.</p><p><br /></p><p>While you&#039;re doing that, read on:</p><p><br /></p><p>I&#039;m not sure there&#039;s anything in radiator fluid <i>itself</i> that would damage your coins, but it might have picked up something else (from the box or elsewhere) that was harmful. &quot;Sticky green tint&quot; sounds like damage from PVC, a soft plastic with components that can react with coin metal (especially copper).</p><p><br /></p><p>If distilled water (soak and rinse) doesn&#039;t solve the problem, it&#039;s worth trying acetone; that can remove some plastic-related substances that water won&#039;t touch.</p><p><br /></p><p>There&#039;s also a product called Verdi-Care, invented and sold by a member here ([USER=17261]@BadThad[/USER]), that can give excellent results removing verdigris (green corrosion) from coins that contain copper.</p><p><br /></p><p>Whatever you do, <b>don&#039;t rub</b> the coins. Under some circumstances, you may end up <i>dabbing</i> the coin with a <i>wet</i> cotton swab or microfiber cloth, but rubbing, especially with regular cloth or tissue, will almost always produce permanent damage.</p><p><br /></p><p>Good luck, and please check back in -- I&#039;d like to know how it goes, and there are a lot of people here who are in a better position to offer specific advice than I am.[/QUOTE]</p><p><br /></p>

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