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<p>[QUOTE=&quot;JDSCOIN, post: 25325, member: 1751&quot;]Hello National dealer,</p><p><br /></p><p>I understand the advice that you had given in this case. But what I had stated was not to say that the coin in question needs to be harshly cleaned, but to point out that there are many methods and instances involved when it comes to ancient coins. Ancient coins are a whole different animal than modern or later coins.</p><p><br /></p><p>The issue of cleaning and preserving ancient coins is a huge subject and not one that has one simple answer. And, as I also pointed out, corrosion can and does &#039;jump&#039; from one ancient coin to another. It does so because the green corrosion can flake off and become air-borne, landing onto other coins. With time and any dampness in the air, it can begin to corrode other coins. This is why we take precautions like putting a thin coating of olive oil onto coins or even (mostly while out in the field) we put a thin coating of laquer on them.</p><p><br /></p><p>Regards, John[/QUOTE]</p><p><br /></p>

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