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<p>[QUOTE=&quot;Insider, post: 2502217, member: 24314&quot;]Insider said: <a href="https://www.cointalk.com/goto/post?id=2502214#post-2502214" class="internalLink ProxyLink" data-proxy-href="https://www.cointalk.com/goto/post?id=2502214#post-2502214">↑</a></p><p>It is not organic if it is INTO the surface. Organic build-up can often be &quot;nudged&quot; with a sliver of a toothpick. That should be all I need to post <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie11" alt=":rolleyes:" unselectable="on" unselectable="on" />; however:*</p><p><br /></p><p>* My &quot;nudge&quot; is a very soft touch using a microscope to see if the crud is soft and &quot;pushes in&quot; or moves. If it is soft, try a drop of acetone on the spot.</p><p><br /></p><p><span style="color: #006600">Be careful. You may put a hairline on the coin if you do not use magnification or push to hard!&nbsp; Besides, with a hand lens you should be able to tell if the spot is raised on the surface or stained into it.</span>[/QUOTE]</p><p><br /></p>

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