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<p>[QUOTE=&quot;jcuve, post: 394180, member: 13945&quot;]The best advice has been given repeatedly: don&#039;t put anything on your coins. I agree with this and have never coated any of my coins - there are a lot of safe airtight options to use instead.</p><p><br /></p><p>However, if one was inclined to use mineral oil like is used in the metal industry, one should use a high grade oil that is pure and then only a very minute quantity. Baby oil would be problematic as it has added ingredients. Vaseline, which is petroleum jelly, and similar to mineral oil, probably should not be used either. Vaseline is not highly refined enough and contains some impurities. There is a highly refined white petroleum jelly that is used by the pharmaceutical industry that contains no impurities but still there could be problems. The fact that excess needs to be wiped off should be a warning sign, it suggests quantity and difficult removal. If there are unwanted impurities (or anything else that could harm the coin) the greater the quantity the more probable there will be damage. And while the micro-cloth may not be appear to damage the coin, under 200x magnification there may be evidence otherwise and is not worth the risk.[/QUOTE]</p><p><br /></p>

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