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<p>[QUOTE=&quot;GDJMSP, post: 5323841, member: 112&quot;]Guys, I can first remember the issue of acetone sometimes causing copper to turn weird colors was discussed, by well known and respected collectors, on the NGC and PCGS forums almost 20 years ago. But it was something I had seen even before that. Others had seen it before that too. That was merely the first time I can recall it being discussed on a coin forum. And I&#039;ve discussed it on this forum for as long as this forum has existed. I&#039;m even the one who originally found the Stonybrook paper and posted it here.</p><p><br /></p><p>I guess my point is, none of this is new, nor are all the arguments against it. The &quot;sometimes&quot; thing is the problem, the basic reason behind the debates. If it happened all the time, anybody, everybody could and would see it - and then believe. But it doesn&#039;t, so they don&#039;t see it, and that&#039;s why so many are skeptical. </p><p><br /></p><p>The second part of my point is that in all the years of my experiments, and the thousands of experiments done by others, nobody, not a single one, has ever reported a case of xylene used on copper resulting in weird colors. But the cases of acetone doing it are more numerous than one would care to count. </p><p><br /></p><p>As for the toxicity of xylene, I&#039;m well aware of what science says, and I don&#039;t argue with it. But I am also aware that tens of thousands of painters often use xylene on a daily basis, getting it all over their skin. And suffer no ill effects. I myself have taken baths in the stuff, washing my hands, arms, legs and face with it, and suffered no ill effects. So to suffer from getting a little bit of it on the ends of your fingers from rinsing coins, all I can say is, based on past experience, I wouldn&#039;t worry about it. If it was so harmful you wouldn&#039;t be able to buy the stuff anywhere, painters couldn&#039;t, wouldn&#039;t use it. But they do, and by the tens of thousands.[/QUOTE]</p><p><br /></p>

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