You're right Kristine, no to cleaning. Ancients do what you may, moderns keep them that way. Collect them in the grade you want them. My eye, my grade, my money! Enjoyed the post thank you.
I think the reason you're struggling is because you are overthinking it. Modern coins just don't get "reprocessed". Except for the steel cent of course!
Thanks. I got the mega red so finding the time to spend woth learning coins, learning my new metal detector, getting the yard ready for spring, and the small add on to my back deck to accomodate my hot tub. Whew..i am running out of hours lol. Man I don't know how you people with kids do it I'm just saying like I don't even have any and I'm worn out at the end of the freaking day LOL
The 1943 cents are the only ones I have ever seen "reprocessed" and they are easy to determine. One was to produce fake copper cents for that year. From a 1961 magazine. The other reprocessing was to renew the zinc coating on the original steel core as zinc being very reactive often became very damaged and dull. So this also was offered, but also easily distinguished because the coin metal was zinc plated as sheets and then the planchets punched out, so the center steel layer was visible from the side and often rusted if original. If the side was "shiney" like the surfaces rather than dull steel color , it was reprocessed. Jim
Most "cleaned" copper cents tend to get a "pinkish" look. Knowledgeable members here know how to conserve copper coins, but I don't