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<p>[QUOTE=&quot;Conder101, post: 3217480, member: 66&quot;]Well that confirms what I thought from another report, the XRF guns penetrate the tested object to a depth of about twice the thickness of the plating.&nbsp; I need to run the numbers again but I believe the plating on a cent is about .0002 inches.&nbsp; So the gun doesn&#039;t read strictly surface, but they don&#039;t tell you anything about the interior and could be fooled completely by a thick plating.[/QUOTE]</p><p><br /></p>

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