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<p>[QUOTE=&quot;GDJMSP, post: 2009858, member: 112&quot;]And doing that will harm the coin. </p><p><br /></p><p>Vinegar is acidic and will eat into the surface of the metal. Salt, all by itself, even when dissolved in water, will also eat into the surface of the coin, copper and silver coins anyway. That is why coins recovered from shipwrecks are often so badly corroded and/or pitted.</p><p><br /></p><p>There are basically 4 methods that a coin can be safely cleaned so as to not harm the coin - soaking in distilled water, acetone, xylene, or dipping the coin in a commercial coin dip. That&#039;s it, nothing else. And each of those methods has to be done properly or else the coin will still be harmed. And each of those methods will only remove certain things from a coin, so you have to know which method to use for each specific coin.[/QUOTE]</p><p><br /></p>

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