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<p>[QUOTE=&quot;SPP Ottawa, post: 1565208, member: 39508&quot;]I have recently tested the PCGS &#039;ray guns&#039; or &#039;sniffers&#039; with coins rinsed in acetone... copper coins, nickel coins, etc... not a single one came back as &#039;Genuine&#039; or &#039;Details&#039;. I even had the lacquer removed from a coin with the last step in the process being a clean acetone rinse. I have unlimited access to a SEM in my lab, and I have studied the surfaces of coins rinsed in acetone... Basically, if the coin is treated (rinse and air dried) as BadThad recommends at the onset of this thread, you can&#039;t see or &#039;sniff&#039; any trace left on the coin.</p><p><br /></p><p>It was pretty much as I suspected. Honestly, if PCGS was using analytical equipment THAT good, and had dedicated technicians and calibration standards to keep it accurate and precise... well, even a rinse in tap water would raise the alarm...[/QUOTE]</p><p><br /></p>

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