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<p>[QUOTE=&quot;Pickin and Grinin, post: 4509651, member: 73995&quot;]With copper I use distilled water first, then I will rotate olive oil and water until the corrosion has mostly been removed. It sucks but you will have to do a little bit of picking at the edges to get some of the corrosion.</p><p>Here is a medal that I dug up a couple years ago. It had a lot of corrosion.</p><p>[ATTACH=full]1117698[/ATTACH]</p><p>The reverse is still slightly unreadable but much better than it was.</p><p>Also neither distilled water or olive oil will change the tone or color of the coin.</p><p>[ATTACH=full]1117699[/ATTACH][/QUOTE]</p><p><br /></p>

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