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<p>[QUOTE=&quot;Autoturf, post: 3559430, member: 103332&quot;]You should research that, there are different ones. its a moot point. but coating and substrate can be analyzed non destructive. your assumption that they take a guess and charge people 40$ to grade is quite laughable. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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