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<p>[QUOTE=&quot;satootoko, post: 38313, member: 669&quot;]I don&#039;t recall welcoming you to the forum Owen, so I&#039;ll do it now.<img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie8" alt=":D" unselectable="on" unselectable="on" /></p><p><br /></p><p>&nbsp;No contest - #1&#039;s advice is A-Number One!!!</p><p><br /></p><p>Depending on the technique used, cleaning a coin will reduce its value by at least 50% and in some cases can make a valuable coin into a worthless piece of scrap metal. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" /> </p><p><br /></p><p>For the very limited purpose of removeing PVC residue, a quick bath in pure acetone - from the hardware or paint store, not the significant other&#039;s nail polish remover containing additives/contaminants - is generally agreed to be OK for white and yellow metal coins.&nbsp; Use of acetone on copper/bronze is somewhat controversial, as many people believe it can alter the color of the coin.</p><p><br /></p><p>Brushing and wiping is <i>always</i> a bad idea, whether you use a brass or steel, bristle, or even camel hair brush; or any kind of cloth.&nbsp; For uncirculated coins even rubbing with a finger is a great big No-No.</p><p><br /></p><p>There have been a number of threads on the subject in this forum, which you can find by clickin on the &quot;search&quot; button near the top right corner of the screen, with the keyword &quot;cleaning&quot;.</p><p><br /></p><p>When using 2x2s it is always a good idea to blow off any cardboard lint with compressed air (keyboard cleaner cans from the computer store work great), hold the coin by its edge when placing it on one of the windows, and clinch the staples flat to avoid scratching adjacent coins.[/QUOTE]</p><p><br /></p>

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