The Safest/Best Coin Cleaning Method?

There is no "best" way to clean silver coins, unless you don't care about their value, since cleaned coins lose most of their monetary value.

Hi Captian

As has already been stated,, Cleaning coins is a NO NO,,

for silver or gold coins with pvc then perhaps a soak in pure acetone to remove the PVC and some oils from finger prints, but it will not remove carbon spots .

if you have highly collectable coins perhaps conservation thru a coin conservation company like NCS
http://www.ncscoin.com/faqs.asp

Rick

I see CrazyCatLady/Brodi/CaptainBelvedere has made the way over here.

My personnal opinion is that about the only thing I would pay for to restore is a beloved coin with green copper rot

For half a year now I have been trying to get red spots of a gold 9999 coin without luck sofar ( only tried like 8 solvents sofar )
And I have seen many auctions with very recent french proofs were the vendor says there is red spotting and the coins sell well because obviously everyboddy thinks the same
How difficult can it be to get rid of the spots