"Tiny Metal Plants, Animals, and Buildings are Liberated From Coins by Artist" (LOL, I like my title better, but to each his own ;-) https://www.thisiscolossal.com/2019/08/micah-adams-handcarved-coins/
In the mid-70's, I helped my Mom set up her paintings at an arts & crafts show in Chincoteague, VA. At the show was a young fellow who used a small drill & coping saw to cut out the fields from silver coins, polished the devices and made jewelry from them. He would melt the excess silver down to make more jewelry. Chris
I recall feeling like a criminal when I put pennies (OK, Lincoln cents) on the railroad tracks when I was a kid. and later picked them up all flattened and elongated...I am pretty sure that if you own a coin, you can do pretty much what you want with it with no fear of becoming an instant criminal.
You can’t deface a coin. You can only counterfeit coins. For example, you cannot take a penny, and try to change the value to $.10. That would be illegal. But you can take a penny, punch a hole in it, and turn it into an earring
Since a past post wasn't referenced, possibly/maybe referencing my post in this thread, is it possible you meant "find motor control" which generally requires the training of a Librarian? LOL
I think he was referring to the fine motor control (performing delicate and precise actions with ones hands) necessary to do something like the OP posted.
I used to do that when I was a kid on the railroad tracks behind my house. I still remember the day that the train derailed when I was about 7 and I had a nightmare about the Chicago and Northwestern railroad coming after me for causing the derailment. In reality the tracks were part of an old line that was used only once or twice a week at that time. Due to the poor state of the rails and ties the trains would only go less than 20 mph.
Right, you can’t alter a denomination to read a different denomination. Other than that, you can mutilate to your hearts content.
My father was a master jewleler/goldsmith and created a few custom order pieces for fellow Latvian expatriates made from 5 Lati coins - the preferred format was a brooch, but pendant necklaces were popular as well - a stock photo of a similar brooch: