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<p>[QUOTE=&quot;Publius2, post: 7436868, member: 105571&quot;]My takeaway from these tests is that US should be used very sparingly and in most cases traditional methods are better.&nbsp; Acetone and Xylene are excellent at removing the organic crud that develops on coins and will not damage the coin.&nbsp; Water and detergents will also remove various organic and inorganic deposits.&nbsp; </p><p><br /></p><p>I think your point is well taken.&nbsp; There are coins that really cannot be damaged more by US than the damage that the world has meted out to them already.&nbsp; Those coins may benefit from the removal of encrustation in terms of preserving them from further degradation.[/QUOTE]</p><p><br /></p>

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