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<p>[QUOTE=&quot;George Chaney, post: 4285831, member: 19137&quot;]You really want to find out what the metal is before attacking it. I have a friend with a niton xl2 which is always quite helpful when dealing with jewelry, but we use it for other stuff as well. </p><p><br /></p><p>If you can figure out the metal, you should be able to figure out what will safely clean it. You probably know this already, but just in case, always test a small area that is not easily seen before tackling a project JIC it stains or damages the metal. </p><p><br /></p><p>I believe you are right, it looks like copper and if so, what you are seeing is most likely simply efflorescence of the copper and should come off without issue.[/QUOTE]</p><p><br /></p>

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