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<p>[QUOTE=&quot;physics-fan3.14, post: 3261347, member: 19165&quot;]Sometimes it takes more than one Qtip. Sometimes it will take several. Dip the q-tip in the acetone first so it is wet and soft, and then apply it to the surface. Repeat until the qtip shows no discoloration. </p><p><br /></p><p>And, if there is stuff in the cracks and crevices of the design, you may have to push a little. Don&#039;t worry, as long as you are using a cotton qtip with a paper core, you won&#039;t damage the coin. </p><p><br /></p><p><br /></p><p><br /></p><p>Acetone will not affect silver, gold, or nickel at all. </p><p><br /></p><p>There is some debate on other metals which I am currently investigating. </p><p><br /></p><p>And, I agree that the idea of a rose thorn makes me cringe a bit - but ancients collectors have been doing that for centuries. I have not personally tried it to see its affects on a coins surfaces for myself, so I will not recommend it.[/QUOTE]</p><p><br /></p>

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