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<p>[QUOTE=&quot;Roerbakmix, post: 6623022, member: 100731&quot;]I used it for raw metal detecting finds, to remove the dirt. Stopped using it as results were unfavorable. Bronze will get pitted and worn out quickly, silver of good quality may have some benefits from this treatment (but other treatments are preferable).</p><p><br /></p><p>For this specific coin, I would not advice a chemical treatment and echo what&#039;s said by others: the underlying material may be rough already. Soaking it in distilled water (not just tap water; distilled water will &#039;absorb&#039; the deposits while chlorinated tap water might harm the coin) for a prolonged period in combination with gentle mechanical cleaning (e.g. rubbing or using a toothbrush) will likely improve the coin somewhat. </p><p>Also, make sure not to seal the coin after cleaning (e.g. in a 2 by 2 or slab): the humidity might result in bronze disease.[/QUOTE]</p><p><br /></p>

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