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<p>[QUOTE=&quot;Insider, post: 4954613, member: 24314&quot;]The OP&#039;s example is why all of us tell folks not to clean coins.&nbsp; However, if you are annal like me and want to clean everything, ancients - many of which are impaired to begin with make great coins to practice on. </p><p>Unless you are experienced and are <b><font size="7">working under a stereo <span style="color: #b30000">Microscope </span></font></b>you should NEVER use a metal instrument on a coin.&nbsp; I laugh when I read about folks using dental instruments with their naked eye or under a large magnifying glass.&nbsp; </p><p><br /></p><p>Work on cheap coins first as you are learning because everything you encounter on them can be found on expensive coins.&nbsp; The other thing to consider is that the removal of many deposits on a coin will leave a depression.&nbsp; Some coins are just better when left alone or given minor conservation.&nbsp; Chemical cleaning is usually a better approach.</p><p><br /></p><p>On the bright side, now you can practice the &quot;smoothing&quot; technique.[/QUOTE]</p><p><br /></p>

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