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<p>[QUOTE=&quot;CygnusCC, post: 8456433, member: 120299&quot;]Hey guys, I got this 50 cent piece for melt + shipping and thought it would be a good test subject for a new ultrasonic cleaner I got.</p><p><br /></p><p>I foolishly didn&#039;t take a &#039;before&#039; picture so the one on the left is the ebay pic for it.</p><p><br /></p><p>After an overnight soak in distilled water to loosen the debris, and then (several) runs through the cleaner with distilled water, I got this result:</p><p>[ATTACH=full]1498582[/ATTACH] </p><p>[ATTACH=full]1498583[/ATTACH] </p><p>The cleaner shuts itself off after maybe 2-3 minutes and pauses for a few minutes before allowing me to turn it back on, so this is probably after an hour total of cleaning (but a couple of hours of soaking in the water while I waited for it to let me restart it each time).</p><p><br /></p><p>It did a great job of removing the black debris, but the debris has left a haze/damage behind. Multiple additional cleanings don&#039;t seem to touch it. I even tried adding a drop of dish washing soap but no dice.</p><p><br /></p><p>I&#039;m thinking next step I&#039;ll try will be an overnight acetone soak. Any other suggestions on what can be done without damaging the coin if it were actually valuable? Or is this it without going the next level and dipping it?[/QUOTE]</p><p><br /></p>

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