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<p>[QUOTE=&quot;imrich, post: 2781681, member: 22331&quot;]In my long term learning process where I&#039;ve ruined some expensive coins, I&#039;ve been amazed at how sensitive the surface of a &quot;90%&quot; Silver or Gold coin is to abrasion. I&#039;ve seen the visual damage that a &quot;Q-tip&quot; cotton swab can do when lightly applying same to the surface of a coin in &quot;cleaning&quot; fluid.</p><p><br /></p><p>I personally would not recommend using anything other than lubricated fingers on a precious coin. Never anything intended/designed for &quot;scrubbing&quot;. Cleaning coins is a difficult process, where I&#039;ve learned that after a proper soaking, only a spray of proper filtered &quot;solvent&quot; is recommended for application under pressure through a minute orifice. Ultrasonic cleaning processes can have wonderful non-damaging results when using proper equipment/technique.</p><p><br /></p><p>The recommendation to not clean coins is believed to be very good advice</p><p><br /></p><p>JMHO[/QUOTE]</p><p><br /></p>

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