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<p>[QUOTE=&quot;Insider, post: 2661398, member: 24314&quot;][USER=85418]@Sandy_NS[/USER]</p><p><br /></p><p>Short answer, Yes.&nbsp; Long answer, so many variables that it would make a nice little pamphlet or book.&nbsp; Fortunately some of the do&#039;s &amp; don&#039;t are taught in ANA&#039;s seminars by Brian Silliman, a former NCS employee.&nbsp; What you can only learn by trial and error are some of the trade secrets (chemicals and technique) that are kept confidential.&nbsp; In this day of computers, there are fewer secrets than you would guess.&nbsp; The OP has one; however, I highly doubt it is used at any of the professional services.</p><p><br /></p><p>At two of the labs I&#039;ve visited (NCS and ICG) coins sent for conservation (anything other than things like common gold, SE and low value coins) are prescreened because some coins cannot be helped.&nbsp; Only the top guy at each service touches the expensive coins (Dave Camire at NCS &amp; Mike Fazzari at ICG).&nbsp; Mike started NCS with Dave. I&#039;ve read in several places that David Hall prescreens and conserves the (expensive ?) PCGS coins. I believe ANACS conserves coins; however, I don&#039;t know anything about that. </p><p><br /></p><p>There are probably several dozen professional coin dealers who do an excellent job.&nbsp; If I had to come up with a motto for &quot;The School of Conservation&quot; it would be: &quot;Non nocere, <span style="color: rgb(0, 0, 0)">Nullum uestigium</span>.&quot;&nbsp; &quot;Do no harm, leave no trace&quot; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie81" alt=":shifty:" unselectable="on" unselectable="on" /> <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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