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<p>[QUOTE=&quot;John Burgess, post: 8206544, member: 105098&quot;]Disclaimer, be sure it&#039;s not a rare date first or something special. do not clean coins of value. save them for professionals to conserve them. </p><p><br /></p><p><br /></p><p>personally, If I were going to do this, I&#039;d probably buy a rock tumbler for $50 or so, Harbor freight again!</p><p>&nbsp;keep it to like coins (copper with copper, clad with clad, and size with size) and then I&#039;d let them dry out and toss them in there with some gravel and let the machine do the scrubbing and then rinse them off. </p><p>if you want to polish them tumble again with some sawdust.&nbsp; that should make them acceptable in appearance but no collector value to them.</p><p><br /></p><p>I know for a fact a couple dozen half dollars will make short work of cleaning up a crusty&nbsp; cement mixer drum of the dried cement, so I&#039;m sure it could work in reverse and knock encrustations off of buried coins. </p><p><br /></p><p>just make sure it isn&#039;t a coin that will lose value by being cleaned before you do it, if it&#039;s a dug up generic cent, it&#039;s still going to be a cent no matter how you clean it up. but some coins are better left alone, just saying.</p><p><br /></p><p>pretty sure the rock tumbler method is going to be noisy, lol, might be worth the extra $30 to buy the ultrasonic cleaner...[/QUOTE]</p><p><br /></p>

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