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<p>[QUOTE=&quot;Just Carl, post: 274324, member: 4552&quot;]Actually this is the best and safest method. Of course to add to this, warm the water also. use distilled water only. Tap water is to full of stuff. If you have a water softener, your water contains NaCl. Now do not put the coins in a metal type pot and then on a stove. If possible, use a glass coffee maker. Put a&nbsp; glass or glass cup on the hot plate portion of a coffee make, allow to get warm and see if the stuff starts to dissolve. DO NOT allow to boil. Although this may help to disolve the junk on the coin, it will also increase other reactions you may not like. Distilled water has a high disolving capability compared to tap water that already contains lots of just stuff, to put it simply. When using the Acetone or Alcohol as suggested, first test to see if not contaminated. Put a small amount on a clean glass dish and allow to evaporate. If a residue, do not use since this solution is contaminated. </p><p>If the water method doesn&#039;t work, the Acetone failed, then do try the Alcohol. Warm Alcohol will also work faster but you must be carefull since if heated it could ignite. Again, if using use only glass utinsils, never metal pans. And as noted, if the alcohol is contaminated with other chemicals, it could do more damage to the coins.&nbsp; </p><p>If all fails, then there is the last resort and then the coins will be considered cleaned but if they are yours, so what. At Walmart in the jewlery department, never could spell jewelery, they have a generic cleaner. I&#039;ve used it on coins to remove fingerprints and it works fantastically.[/QUOTE]</p><p><br /></p>

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