The silver coins got a little toothpaste rub. The ring and chain got a ride on the buffing wheel and the nickel, which was really bad got electrolysis. Unfortunately I got my anodes mixed up and used one from a copper object previously, hence the copper color.
I found one with 'Boy Scouts Of America' on the reverse, by eyeball, when I was 12 years old walking the AZ desert looking for arrowheads. Still have it.
Another bit of rain yesterday so I went back to the gravel lot and listened deep. I was quickly rewarded with a 1946 Walker, and then a 1936 only 8-10 feet away!
That's the second time that has happened to me, the first being in 2021 high in the Sierra forest. These four are the only Walkers...