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<p>[QUOTE=&quot;Just Carl, post: 168539, member: 4552&quot;]Start with distilled water and gently, very gently splash around the water with an artist paint brush. If nothing happens, try adding a little baking soda to the water. It is true that if your coins are Siilver and the ground is acidic or caustic, the coins could now be covered with compounds of that substance. Silver is highly reactive and will combine with many substances such as Sulfides, Sulfates, Fulminates, Chlorides, Iodides, Oxygen, etc. The reason is it&#039;s outer shell of electrons has only 1 making it suseptical for combining with just about anything in the soil.</p><p>&nbsp;Back to the method of cleaning. If a very fine paint brush with the baking solution has no effect, try the old faithfull Acetone. Again, just lightly brush with an artist type brush. If all these methods fail then it is just experiment time. Try anything you have laying around the house such as Lemon Juice. Always do it gently though. And remember that any contaminate you remove from the coin was probably there due to the Silver combining with some other agent and removing the contaminate means you will be removing some Silver. You can not pull a Sulfate from the coin leaving only the Silver behind.[/QUOTE]</p><p><br /></p>

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