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<p>[QUOTE=&quot;Kentucky, post: 2284222, member: 33176&quot;]Usually in cleaning a coin, it is good to pay attention to what is called the polarity of the solvent.&nbsp; Water is a very polar solvent and will clean away a lot of salt-like contamination.&nbsp; Soaking a coin (or coins) in water will not harm them.&nbsp; Many here like to use distilled water, but tap water us usually fine as long as you blot the water off using a soft cloth (no rubbing!!!).&nbsp; If this does nothing, the next step could be acetone which dissolves lots of organic stuff.&nbsp; If it is still nasty, the next step would be toluene or xylene, both of which are very non-polar and are good for removing greasy or oily stuff.&nbsp; A good point was made that if you really see corrosion, that represents the destruction of the surface below the corrosion, and if you remove it, you will have pitting at the very least.[/QUOTE]</p><p><br /></p>

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