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<p>[QUOTE=&quot;RonSanderson, post: 2465027, member: 77413&quot;]I believed this was the reason for 3 steps with the acetone. </p><p><br /></p><p>The first soak will dissolve organic crud, so the coin will be bathing in a soup of diluted dirt. If you take the coin out and let it dry, some of the dissolved crud will redeposit on the coin as the acetone evaporates. </p><p><br /></p><p>Moving to a second bath lets this be further diluted and might let a bit more organic crud dissolve.</p><p><br /></p><p>I have seen recommendations that the third step is to pour clean acetone over the still-wet coin when you take it out of the second bath. This removes any suspended and dissolved junk from that stage.</p><p><br /></p><p>Then the coin is held by opposite rims so the acetone can evaporate. At this point there should be no remaining haze due to the acetone treatment.[/QUOTE]</p><p><br /></p>

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