I AT'd an Ike once. Put it directly on the propane grill while cooking some meat. It toned the coin. Does this help? The before: The apparatus: Almost done: The after:
I over did the obverse and didn't spread the BBQ sauce thoroughly. Live and learn. Still edible though.
Well, you are still alive so I gather it was gold. Tell her about XRF guns....you have one , right????
Rather bizarre thread. Only advice I can give is don't clean copper coins with baking soda. When I was a new collector (7 years old), my grandmother gave me 7 dark worn Indian cents. I thought they looked dirty and would clean up nice with some baking soda paste. They all turned the most repulsive color of orange known to mankind. My gut tells me there is one chance in a hundred of improving a copper coin. James
I guess 7 degrees isn't too bad then! Yikes, that's scary. The search function isn't that great at numisforums, but there's been various topics about toning silver. Nothing nefarious, they were trying to put a little bit of tone on it after the coins were cleaned blast white by the dealer. Mostly stuff like throwing the coin in a baggie with a boiled egg, etc. Nature toned this. The dealer had enough sense to leave it as a semi-uncleaned. I've rarely had problems with the old PVC flips (except them fusing to the ink on the ID part) except for a junker Valerian billon Antoninianus. It's now cherry red in parts of the fields!
Are you asking me if it's a taboo or methods? I'm a notorious klutz at hands-on stuff. Assuming the former, tooling is a big no-no (although I've heard that Europeans don't mind it as much), smoothing fields can be a no-no, depending on the collector. Per cleaning, other than stripping an AE coin of a patina, I guess there aren't any really hard rules about it. Out of the ground silver looks like the above, so cleaning is necessary in most cases (although the above were bought to keep as is). These common coins in an uncleaned state were much more interesting. Like Aaron Berk said in his podcast, all ancients come out of the ground so they have to be cleaned to some extent. Most collectors don't want a black silver coin. Toning is generally strongly preferred for silver, although most toning came from cabinet toning. Brightly cleaned silver can also be attractive, in certain cases: The miniscule chip knocked a couple hundred off of the purchase price. The dealer managed to break the above Nero through shoddy shipping (and hasn't responded to me), but that's either very old cabinet toning or a hoard patina. It's a bit darker in person. The coin is bent at a 30 degree angle now.
Yeah i was asking the taboo part. Excellent information. just in case you haven't been keeping score at home i am the dude who had an MRI and went into shock and died Dec. 21 st. Since then I have not been allowed to work. Am sitting around waiting for test results for a side effect called Typase mast cellular regeneration syndrome. high point of each day is the twice a day reports to two different nurses for blood pressure and blood sugars. Looking for just about ANYTHING to spend time doing. Maybe ancient coins deserve a look. Lol.