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<p>[QUOTE=&quot;GDJMSP, post: 117878, member: 112&quot;]What makes you think this ? Olive oil contains an acid, it&#039;s a mild acid to be sure, but still an acid. That&#039;s why ancient collectors use it to clean up their coins. It works very slowly, but you&#039;re right it will eat stuff away. I would no more use olive oil on a coin of any value than I would dip it in battery acid.</p><p><br /></p><p>The product biox is specifically made to remove verdigris. I have not personally used it, but it is a rather inexpensive item and it would be a simple matter to test it on an inexpensive coin to find out the results. From what I have read of the product it does not harm the coins but I cannot say this with certainty. I cna only tell you it will remove the verdigris.</p><p><br /></p><p>Picking at verdigris with a toothpick, a thorn or a brush only removes the top layer of corrosion. It does not remove the underlying layers and the chemical reaction &amp; corrosion will continue in time.[/QUOTE]</p><p><br /></p>

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