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<p>[QUOTE=&quot;sand, post: 7790894, member: 118540&quot;]I&#039;m no expert in this type of thing, so take what I say, with a huge grain of salt. I&#039;ve had some success, removing stubborn stuff, by putting a coin under a low powered microscope, and using a sharpened wooden toothpick (try this first), or using a very pointy, very sharp scalpel, to push or scrape the stuff away. However, it is very easy, to accidentally scratch the underlying green patina, exposing bare metal (I have had this happen). So you have to be careful. And you have to be lucky.[/QUOTE]</p><p><br /></p>

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