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<p>[QUOTE=&quot;hontonai, post: 617921, member: 4703&quot;]Big no-no #2!</p><p><br /></p><p>Cloth of any kind produces hairlines when rubbed on a coin.</p><p><br /></p><p>For really dirty coins, after an initial acetone bath (in pure stuff as stated above) swirl the coin around and transfer it briefly to a glass dish with fresh acetone.&nbsp; Then put it through two or more baths in fresh distilled or deionized water.</p><p><br /></p><p>As a last resort if there is caked-on dirt that won&#039;t swirl off, hold the coin by its edge under a cold water faucet, then finish with another distilled/deionized bath.[/QUOTE]</p><p><br /></p>

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