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Message:: [QUOTE="GDJMSP, post: 1598524, member: 112"]Oh Doug's around Lance, just took me a while to get here. Been, shall we say, under the weather for the past week. Your results turned out much as I would have expected them to, except on the '30 and the '40. A bit surprised by those. But as you already know I definitely second your recommendation to not use MS70. Sadly, not so many years ago, a lot of folks did. And a lot of coins on which it was used ended up in NGC and PCGS slabs. I suspect some still do today, but not like they used to thankfully. Gotta admit it does make 'em pretty though. And I think it is worth mentioning, and this was a large part of the problem a few years ago, it is not unknown or even really all that uncommon for natural toning to produce the same/similar colors/patterns on copper. And I will also say that MS70 can sometimes work wonders on hazy Proof silver or clad coins. PCGS (and probably NGC too) has often been known to use it themselves before grading coins. And many, many, collectors and or dealers have used it on coins before submitting them for grading. And gotten very good results. But on copper, nahhhh, stay away.[/QUOTE]