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<p>[QUOTE=&quot;GDJMSP, post: 1354680, member: 112&quot;]All you need to do is read the whole paragraph.</p><p><br /></p><p><span style="color: #505151"><font face="Arial"><font size="1">A spot results when a concentrated amount of an oxidizing substance is allowed to remain on the surface of a coin. Most spots take time to grow. A coin might have been contaminated long before you acquired it. Removing spots is nearly impossible. Trying to will generally result in more overall harm than good. <b><u>When spots are found the best strategy is to suppress further growth.</u></b> There may be other products that work as well, but I have had success using Blue Ribbon coin conditioner and preservative. When applied to the surface of a copper or bronze coin, this light oil-like substance will leave a thin protective film and a glossy appearance. This same product is good for removing PVC, as well as other forms of slime and dirt, from all copper and bronze coins. Hopefully the following is common knowledge, yet I feel compelled to mention this: Copper and bronze coins should never be dipped. Liquid tarnish remover will not remove spots and your coin will end up an unnatural -- and to the experienced numismatist, ugly -- orange color. Dipping a copper or bronze coin nearly always ruins it!</font></font></span></p><p><span style="color: #505151"><font face="Arial"><br /></font></span></p><p>Read the bold and underlined part. It seems pretty hard to argue that he is not talking about using Blue Ribbon to suppress further growth of those spots, especially since that is precisely what he says.</p><p><br /></p><p><br /></p><p><br /></p><p>I guess that is a matter of interpretation. I consider a coin with spots, and one with the potential to grow more spots, to be a problem coin of sorts. And since the author specifically calls for the use of Blue Ribbon on coins with spots to specifically prevent the growth of more spots, it seems he considers those coins with spots to be something of a problem coin as well. Otherwise why would he be making a suggestion of what to use to solve that problem ?</p><p><br /></p><p>And PCGS considers coins with spots to be a problem coin of sorts as well since their own published grading standards specifically say that coin with spots should be graded no higher than MS65.</p><p><br /></p><p><br /></p><p><br /></p><p>Nor did I. But the fact remains that PCGS specifically considers Blue Ribbon to be a substance that will cause a coin to be put in a problem coin slab.[/QUOTE]</p><p><br /></p>

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