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<p>[QUOTE=&quot;GDJMSP, post: 1025681, member: 112&quot;]Properly cleaning coins is and always has been accepted. The key is not doing any damage to the coin, or altering its surfaces in any way. So any method that will remove dirt and or grime and not do that is perfectly acceptable.</p><p><br /></p><p>But therein lies the problem. Using a cloth of any kind will damage the coin, same for any brush no matter how soft it is. And soap of any kind, any cleaning liquid or detergent, pretty much anything you would use for cleaning around the house, is strongly not recommended. That&#039;s because all of these household cleaning agents leave traces behind on the coin, and in time those traces of chemicals will damage the coin. Even plain tap water is harmful to coins, not only because of the chemicals it contains, but also because of the various minerals found in tap water.</p><p><br /></p><p>So that doesn&#039;t really leave you with much to use. The one thing you can use is distilled water, and some will say to not even use that, but to use deionized water instead. Of course you can also use acetone on non copper coins, but even acetone can cause copper to turn all sorts of weird colors sometimes.</p><p><br /></p><p>Same thing for stuff like vinegar, Coca-Cola, tomato juice, any citrus juice, olive oil, ketchup, taco sauce - and on and on and on. All of these things will clean coins, but the reason they clean coins is because they contain an acid. The acid is what does the cleaning. But it also alters the surface of the coin, thus turning any coin so treated into an instant problem coin.</p><p><br /></p><p>This is why what you will normally hear is to just not attempt to clean coins. It&#039;s becauae just about anything you try to use will cause harm of one sort or another to the coin. Yeah you can try the distilled or deionized water - but they don&#039;t do much when it comes to cleaning, hardly anything at all.</p><p><br /></p><p>Now you can dip coins, in a commercial coin dip. And then rinse and neutralize the dip. But any circulated coin you do that too looks like a coin that has been cleaned. And some will even say it has been harshly cleaned because circulated coins just don&#039;t look like that. And if there had been any remnants of luster left on a circulated coin - the dip will likely remove it. And again, you end up with a coin that will be said to have been harshly cleaned.</p><p><br /></p><p>Yeah, there are some chemicals out there like whatever it is that NCS uses. But nobody knows what NCS uses, or how they use it, or how long they use it.</p><p><br /></p><p>So you tell me - is there an acceptable method ? If there is, I don&#039;t know what it is.[/QUOTE]</p><p><br /></p>

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