Best way to clean shield nickel

[pepperj]

Stinky proven way on silver is: Place coin on foil, gob of spit, wrap, hold, gets hotter than a pepper, stinky, egg/beer fart, unwrap, rinse, repeat if not liking the result.
Now why I say spit? Seems to have the properties water doesn't, maybe the PH levels in the spit.

 

[eman1000]

http://www.treasurenet.com/forums/coins/174700-results-using-vinegar-salt-dug-nickels.html

I dug a black crusty shield nickel and could not make out any features. Tried this and it complete cleaned the coin and I could get a date. Would not recommend on something of value though.