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<p>[QUOTE=&quot;GDJMSP, post: 274617, member: 112&quot;]It&#039;s cleaning to me too, but it is not harsh cleaning. And no, I never recommend doing it unless it is absolutely necessary. Probably 99% of all the collectors out there will tell you that acetone is harmless to coins. I&#039;m in the 1% that disagree. I have seen too many coins dipped in acetone with a residue on them that shows up later.</p><p><br /></p><p>Yes there is a proper way to do it, if you are going to do it. </p><p><br /></p><p>Get 3, clean, glass ( NEVER plastic ) dishes or small bowls and place a small amount of acetone in the bottom of each. Dip the coin in dish 1 and leave there for as much time as you think is needed. That may be anywhere from 10 seconds to an hour depending on what is on the coin. Then dip the coin in dish 2 for 10 seconds or so. Then dip the coin in dish 3 for the same time. Then remove the coin, rinse it thoroughly in distilled water and let it air dry.</p><p><br /></p><p>If this does not completely remove the contaminant from the coin, repeat the process. But make sure you throw all of the used acetone away and use clean dishes or wash &amp; dry them before using them again. If after two attempts it doesn&#039;t work, then it&#039;s not going to work.</p><p><br /></p><p>And always do this in a very well ventilated ( <u>fresh air</u> ) area.[/QUOTE]</p><p><br /></p>

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