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<p>[QUOTE=&quot;Pishpash, post: 2300346, member: 71514&quot;]It all depends on what you have used before.&nbsp; If you have soaked in oil, then you are stuck with oil.&nbsp; If not, I would suggest distilled water or de-ionised water.&nbsp; Leave it to soak changing the water when it becomes cloudy.&nbsp; This could take a very long time, so patience is your friend here.&nbsp; If you think there could be any organics on the surface, you could try washing it in 100 percent acetone first.&nbsp; Have a pick at it every now and then with something not too sharp, then chuck it back in the water.&nbsp; It could take months but any shortcut is likely to spoil whatever is left on the coin.[/QUOTE]</p><p><br /></p>

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