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<p>[QUOTE=&quot;mrjason71, post: 2990531, member: 90347&quot;]That&#039;s good. If they scraped them, there would be no hope. I&#039;ve seen things saying long soak in mineral oil could break some of these down without adversely affecting the rest of the surface. Have to give it a try. Supposedly takes a long time. There&#039;s so much available info on helping all other problem coins: excessive toning, verdigris, pvc, etc etc. Just feel there&#039;s got to be somethjng someone might know of to add to the public body of information. There&#039;s so much clamor about saving coins for future generations and the responsibility we have to protect these tangible pieces of our history. Well these little black Devils are the worst of the worst <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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