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<p>[QUOTE=&quot;Kentucky, post: 2585222, member: 33176&quot;]From the Cambridge Dictionary...</p><p><i>&quot;Affect</i> is a verb meaning ‘influence or cause someone or something to change’:</p><p><br /></p><p><i>The cold weather has really <b>affected</b> her health.</i></p><p><br /></p><p><i>New technologies continue to <b>affect</b> how we live.</i></p><p><br /></p><p><i>Effect</i> is a noun that means ‘the result of an influence’:</p><p><br /></p><p><i>The pollution in the city had a bad <b>effect</b> on me.</i></p><p><br /></p><p><i>Most people these days understand the serious <b>effects</b> of smoking.&quot;</i></p><p><br /></p><p>Now that I got that out of my system, acetone is a solvent that primarily removes organic materials (PVC gunk).&nbsp; As a solvent it could also float off any dirt or inorganic stuff that is on the coin, particularly if it is held on by organic gunk.&nbsp; It should not affect metals in any way, but I hesitate to poo-poo the experiences of dedicated coin collectors and you should do so only at your peril.&nbsp; MS70 is mostly a solution of a STRONG base (don&#039;t get it on your hands and especially in your eyes) which will turn organic gunk into soap.&nbsp; It also has solvents that will work well to remove lots of other stuff (disclaimer...I&#039;ve never used it).[/QUOTE]</p><p><br /></p>

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