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<p>[QUOTE=&quot;GDJMSP, post: 1760656, member: 112&quot;]What I think is that you need to re-think a few things.</p><p>&nbsp;</p><p>First of all that appears to be heavy verdigris on the coin, and mineral oil will have little to no effect on it. If I were going to try removing it I would use Verdi-Care. Even olive oil, which is slightly acidic, will likely have little to no effect.</p><p>&nbsp;</p><p>Secondly, I do no think that is an error underneath all that corrosion. It looks to me like somebody was playing around with a brazing rod, flux, and heat. I would just throw the coin away.</p><p>&nbsp;</p><p>Thirdly, ever hear that oil and water do not mix ? Distilled water will not remove mineral oil, or any oil. But if you are intent on going through with your experiment, use xylene to remove the oil when you are finished with it.[/QUOTE]</p><p><br /></p>

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