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<p>[QUOTE=&quot;Oldhoopster, post: 3628286, member: 84179&quot;][USER=101265]@Chip Kirkpatrick[/USER] An experienced numismatist WILL be able to spot most cleaning attempts.&nbsp; TPGs will not grade them and the values are reduced. </p><p><br /></p><p>There are techniques that may not be detected, but to accomplish this, you really need to have a decent understanding of chemistry and metallurgy, along with a lot of experience.&nbsp; Each coin is different, so you need to understand the risks and probability of success every time you consider cleaning a coin.&nbsp; And one mistake, you&#039;ve significantly reduced the value. </p><p><br /></p><p>There is no one size fits all advice.&nbsp; It is extremely difficult to converse a coin correctly, and very, very easy to screw it up.&nbsp; That&#039;s why you constantly&nbsp; here &quot;never clean coins&quot;. </p><p><br /></p><p>You are free to do whatever you want, however, I can almost guarantee that whatever you try will be detectable and the value of your coins will be reduced[/QUOTE]</p><p><br /></p>

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