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<p>[QUOTE=&quot;Kentucky, post: 3744459, member: 33176&quot;]Gee, I don&#039;t think I have seen anyone mention THF here except for me.&nbsp; We used it by the tanker car full where I worked.</p><p><br /></p><p><span style="color: #ff0000">Interesting to learn the sniffer is FTIR in reflectance mode.&nbsp; From the name, I wrongly assumed it was GCMS.&nbsp; Should be called &quot;the looker&quot;.</span></p><p><span style="color: #ff0000"><br /></span></p><p><span style="color: #ff0000">I wonder if a coin treated with Verdicare and then treated with acetone would lose the residue left by Verdicare and escape notice by the sniffer.</span></p><p><span style="color: #ff0000"><br /></span></p><p><span style="color: #ff0000">Cal</span></p><p><span style="color: #ff0000"><br /></span></p><p><span style="color: #000000">From the name, I thought it was GCMS also.&nbsp; I think Thad says that an acetone rinse will remove VerdiCare protective layer.</span>[/QUOTE]</p><p><br /></p>

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