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<p>[QUOTE=&quot;Insider, post: 3981025, member: 24314&quot;]physics-fan3.14, posted:&nbsp; &quot;I don&#039;t know about that. I&#039;m a great deal younger than you are. &quot; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" /></p><p><br /></p><p>Well, I don&#039;t know about the close to a thousand (or a little over) gold spot removals I did at NCS but I do know about two of my personal RAW gold coins that were done over thirty years ago...no spots have returned.&nbsp; Additionally, all of these conserved coins get put into slabs right away so they are even more protected from the environment.&nbsp; </p><p><br /></p><p>Now, I do have a gem 1913 Buffalo nickel that looks like a proof strike with a recurring darn SINGLE small spot that I&#039;ve had to remove at least four times over the same thirty years.&nbsp; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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