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<p>[QUOTE=&quot;Frankcoins.com, post: 1420962, member: 16048&quot;]For posterity, it&#039;s better to bite the bullet and abrasively clean a coin with this type of corrosion, because the coin will eventually be destroyed. It&#039;s the 75% copper causing this, pure nickel is immune. Like a rusty fender, if you don&#039;t sand it down to bare metal, you eventually won&#039;t have a fender. Of course, the cleaning should be disclosed, and would be obvious, anyway.</p><p><br /></p><p>The old &quot;nic-a-lene&quot; kits with a soft wire brush and bottle of stuff similar to &quot;naval jelly&quot; can actually remove this type of corrosion if not too deep.&nbsp; But in the past 25 years or so, collectors have been so afraid that cleaning is NEVER EVER acceptable that they would rather have a coin develop HOLES in it than do something that anyone with metalworking experience would consider necessary to save the item.[/QUOTE]</p><p><br /></p>

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