A friend of mine sent me this ... a very interesting video on a foreign coin. I never knew it was like this. I'm sorry if this post isn't in the right place, but it's worth a watch: https://twistedsifter.com/videos/polishing-a-coin-with-progressively-higher-levels-of-grit/
To all but a fresh novice collector, sacrilege. If you like to make dazzlingly shiny objects out of coins that will forever be worth face value or metal content, with maybe a slight exception for making jewelry, have fun.
Unfortunately polished coins are frowned upon by coin collectors. Jewelry makers make use of them but not coin collectors. Just a heads up!
I was slightly entertained. amazing how shiny it became. I wouldn't recommend doing that to anything other than common circulation coins
Did you ever think, if you like to polish coins, why don't you just collect Polish coins? Now come on, I can't be the only one who thought of that.
That video has been linked to before, though I don't remember which thread it was. Sure, it's numismatic sacrilege (especially if it had been done on a coin with any value), but just in terms of basic metal polishing, it's pretty impressive.