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<p>[QUOTE=&quot;mrbrklyn, post: 174207, member: 4381&quot;]No, you just don&#039;t know what your looking for or the magnification level you need to see it.</p><p><br /></p><p>As a chemical fact, the dipping process would leave a fingerprint that would be found by someone expert in looking for it.&nbsp; Set me up with about 40K and a lab, and in 6 months and at the end of the process I&#039;ll be able to nail every dipped coin under my nose, and I&#039;d bet a billion dollars on that because there are many fields which do ***just*** that with metal compounds and alloys (not to mention more amazing stuff far beyound this simple thing).</p><p><br /></p><p>In fact, you can largely automate that with software, and many manufactoring processes do this.</p><p><br /></p><p>Ruben[/QUOTE]</p><p><br /></p>

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