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<p>[QUOTE=&quot;gsimonel, post: 3585196, member: 82549&quot;]Well, you aren&#039;t likely to impact the authenticity--the coin is either genuine or not, regardless of how clean it is. As for value, I wouldn&#039;t worry so much about that. Rather, consider the aesthetics: is the coin likely to be more or less pleasing if you clean it? Ancient coins are not like US coins in that respect; you don&#039;t automatically destroy its value just by cleaning it.</p><p><br /></p><p>I&#039;ve had a lot of experience cleaning coins. I&#039;ve ruined a few in the process, and I&#039;ve also had many successes, some quite spectacular.</p><p><br /></p><p>I&#039;d say it depends on the coin. You might post a picture of the coin or coins that you are considering cleaning. Then we can give you more specific advice about whether/how to proceed. Of course, the answers will be all over the map, but at least we&#039;ll know what specific coin and preservation state we&#039;re pontificating about.[/QUOTE]</p><p><br /></p>

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