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<p>[QUOTE=&quot;BadThad, post: 2466476, member: 17261&quot;]They have ZERO effect on copper toning.</p><p><br /></p><p><br /></p><p>If that happened, then there was a residue on the surface of the coin. It needs to removed using the CORRECT solvent....and acetone obviously is not the solvent.</p><p><br /></p><p>I have ONE single &quot;bad&quot; experience with acetone on a bronze, copper-based token that was my Grandfathers. Acetone created a haze on the surface. I soaked the token in xylene for 24 hours and the invisible surface residue was removed. I hit it again with acetone after the xylene and no haze was produced.</p><p><br /></p><p>I suspect that these &quot;very knowledgeable and well respected collectors and dealers&quot; don&#039;t know squat about chemistry. They hit a coin with acetone, some something weird happened and concluded, without further investigation, that acetone effects copper.</p><p><br /></p><p>Xylene will <b>absolutely NOT</b> remove anything that acetone will! They are VERY different solvents, acetone is polar and xylene is non-polar. Acetone is totally ineffective at dissolving longer-chain organics. Try mixing oil and acetone, they will separate....just like with water. I always CRINGE when I see people using EVO and saying they rinsed it off with water at the end. Neither water nor acetone will remove oil from a coin surface![/QUOTE]</p><p><br /></p>

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