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<p>[QUOTE=&quot;Just Carl, post: 127572, member: 4552&quot;]I agree that the coin in question is not of such a value that a little experimenting would be fun and educational. First try the Acetone soaking for a little while and longer if no results. You may also want to try&nbsp; a solution of baking soda and distilled water. Always wash the coin with distilled water when finished with such experiments and blow dry or blot with a cottom ball. </p><p>As to&nbsp; the type of contamination this coin has incurred, it is difficult to know exactly what it may be. However, since it appears to be primarily on one side, it may well be a heavy oxidation due to a partial exposure to the air being in some type of container. However, a greenish type of contamination dose not usually indicate Oxidation so several methods of removal may be required. One thing you may want to try is Laquer Thinner remembering your about to not help the value of this coin.[/QUOTE]</p><p><br /></p>

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