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<p>[QUOTE=&quot;BadThad, post: 637934, member: 17261&quot;]DMSO shouldn&#039;t be used by anyone except trained chemists. Do not play with that solvent.</p><p>&nbsp;</p><p>Xylene is not similar enough to the material on the coin, therefore it wouldn&#039;t dissolve it. With solvents, just remember &quot;like dissolves like&quot;. Like desertgem said, the material must be a cross-linked polymer. This produces a very long carbon chain, it will be very tough to dissolve. A mixed solvent system such as mineral spirits or gasoline may work better and, at this point, be worth a try to remove the remaining surface debris.[/QUOTE]</p><p><br /></p>

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