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<p>[QUOTE=&quot;Valkyrja, post: 8163514, member: 134285&quot;]Oh wow. I had no idea this was such a heated and controversial topic, but it makes sense that people experiment on their own before seeking guidance. I better preface realllly good, here goes-</p><p><br /></p><p><br /></p><p>HI! I&#039;m new and fairly nice and reasonable haha. I got Some very good information on this thread already but still need a bit of clarification- I am a firm believer in proper cleaning and conservation methods (I will explain why and how if requested) and I am interested in how certain stoddard solvents work on collectible coins, namely the op thread namesake (coin care) and Nevr-Dull, I&#039;m asking here before experimenting. Assume we are not talking about Mint uncirculated coins or natural patina and toning. Also I am only interested on the effects to cuprous metals.</p><p><br /></p><p>I know that if I want to stop/revert/strip certain damaging corrosion I can use a controlled electrolytic bath, but that is basically saying goodbye to patina. The ol&#039; toothbrush/green scrubbie makes me cringe with the abrasiveness, ugh.</p><p><br /></p><p>So what do the metal cleaners actually do, how fast, and can they be controlled?</p><p>Do they preserve patination and toning or act like the silver cleaners, (instantly and irreversibly pristine)?</p><p>Lastly would it be considered cleaned and ungradable by PCGS?</p><p>Thank you in advance for any insight you may have.[/QUOTE]</p><p><br /></p>

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