Definitely a mortal sin... a Cardinal sin you would need be naked while using the buffer. I use acetone dip on most all my coins that I believe that a dip would help....no rubbing or scrubbing.
Give it a bath of acetone..it wont hurt unless you rub and scrub ....on my coppers I do give each a little verdicare...to protect against any vergis or rot..
It'd be a shame to make a nice, original gold coin look all new and shiny, just like all of the others out there.
Acetone should loosen the crud, and not remove the orange color. If you immerse it in a jewelry cleaner, it will remove the orange color, and turn it brighter yellow, which will look less natural for a coin of that age.
Do as @ToughCOINS says.......a bit a soak in pure acetone may do the trick. Anything harsher may ruin the coin. That said, I don't think that coin is that far gone to warrant a more stringent cleaning. If it were me, I'd leave it be........
I know quite a few whom would love it as is.... myself as 1...that color is one that only happens by age. Soak it in acetone...and see if your then feeling the love. The my advise sell it to someone who will love it and withnthe proceeds buy your next one. Its a nice coin...no doupt.
I’ll state of health? It’s beautiful and it took 101 years to get that look. Please don’t do anything to it.
When you say it like that I feel much better about its state. I placed it in acetone as ToughCOINS suggested. The Viente looks much more healthy now.
Yes, great looking gold coin with a scarce date, I'd be proud to own it! Acetone works wonder on dirt!