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<p>[QUOTE=&quot;desertgem, post: 445904, member: 15199&quot;]The opinion on the use of Acetone will differ, but mine is that if it is pure, it will only react with organic material and as ANYthing, even pure water, can pick up contaminants from the environment, it should be used briefly and not soaked for hrs. Although as an experiment, I have put matched RB and BN cents in it for weeks and no noticeable effects on surface in pure acetone and also xylene, as compared with the untreated control coins.</p><p><br /></p><p><b>HOWEVER!</b>, if there are organic material that has been on the surface of the coin such as a thin layer of oil, varnish,gunk, or &quot;conditioner&quot;, when acetone removes this, the underlying patina<b> MAY</b> be different than before and will react differently with the environment once exposed.&nbsp; Many old time darkener solutions used an oil or wax substrate and when those are removed by the acetone, the color <b>WILL</b> look different.</p><p><br /></p><p>This is just my experience, and yes I was very careful with the 55 and rinsed it, stood it on edge to drain the acetone off, air dried and checked to be sure no scum settled on it. Theoretically, pure acetone should not react with metallic material, but in use, may result in a difference in appearance due to removal of non-metallic material. Over time the non removal of such material might also produce metallic damage, corrosion, so choose your risk <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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