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<p>[QUOTE=&quot;desertgem, post: 3826440, member: 15199&quot;]It actually looks like a iron pipe leak dripped on them and mainly a surface stain.&nbsp; I think your best bet is to go the acid dip, but dilute it 1 dip : 10 water, so you can watch and yank the coin out when at an end point, rinse well. With luck, the iron might come off. The dip if done lightly has a chance to retain some original cartwheel.</p><p><br /></p><p>If it , nor nothing else helps, phosphoric acid ( Naval jelly of Rust remover) might do it, but it will give a duller surface. </p><p><br /></p><p>Yes,First try water , soapy water, acetone or 90% isopropyl alcohol from Walmart medical area. Rinse well.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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