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<p>[QUOTE=&quot;rlm&#039;s cents, post: 815404, member: 7957&quot;]It is even worse than that.&nbsp; Most impurities in water are salts - the stuff that stays on coins and then reacts with coins.&nbsp; At least when I was using it, the most common impurity in acetone is water (pure water) and then other volatiles.&nbsp; That is the stuff that goes away and does not affect coins.&nbsp; So even if the acetone has 10 times the impurities, it may have 1/10 the affect on coins.[/QUOTE]</p><p><br /></p>

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