How Do I Remove.....?

I would try 100% acetone first to see if it helps the coin before I tried anything else

It could be a poor mix of silver & copper. 90% Silver 10% Copper. The older Lincoln Cents had a poor mixture of copper in them. Don't know if it will come off without removing some of the surface and cleaning it. I can't imagine any other reason the green would be there.

I got my 100% acetone from the drug store (CVS) right up the street, it was allot closer than the hardware store (CVS and Walgreens is on every corner around here)it is near the finger nail polish. Be sure you get 100% acetone and not just finger nail polish remover

DO NOT attempt Olive Oils, WD-40, Jewlery cleaners, Ketchup or the many other weird things people may recommend. Many say to use those things since not their coin, they don't care if you ruin it. If you ruin it trying some of those things, those people that said so will just say, Oooopps, to bad, oh well it's your's not mine. As already noted, the best is Acetone. Of course you could just try some distilled water first. Place a coin in glass container and heat very, very gently. If this dosn't work, then try the Acetone. Note this. First place the Acetone on a clean Glass dish. Allow to evaporate. If there is any residue, the Acetone is contaminated, so discard and don't use on coins. If clear, allow the coin to sit in a GLASS dish with the Acetone for a few minutes. Remove, rinse with distilled water, place on a cotton cloth and blow dry with a hair dryer on low or no heat. Only use glass containers, never a metal pan or pot. DO NOT use metal utinsils such as a spoon to add or remove the coin. Try to use glass for all. That is a nice coin so be carefull with it.
If all fails, I would leave it alone after that. Old saying "let sleeping dogs lie". Just make sure you place it in a place with as little air as possible. 2x2 or something. Nice coin.

Carl, you have quite a sense of humor :)
Doesn't bother me that much - just would like for it to go away as the coin
still has some nice detail.
For those who inquired - no, the mint luster doesn't show; however, who knows what might lie beneath 75 years of buildup. I'll try to get to the hardware store today, and pick up a can of pure acetone. I'll let y'all know what happens after a nice soak.

Ralph

Yup grovey, that's all I'm gonna do - getting some pure acetone today, got distilled water in the refrigerator, but I'll have to let it air dry - completely bald, and don't have much need for a hair dryer. :)
It was a nice find, wasn't it?

Ralph

Sorry, I don't agree with those who say the use of wd-40 will ruin a coin. Please see this link. Often times the perceived bad reputation a substance has is worse than the reality, but if that's what you want to believe...

http://www.whitlowltd.com/updates.html
"Removing residual sticker gum - Use WD40 (yes WD40!) to remove the residual gum left behind on holders when stickers are removed. We have all tried many things to remove this "goo", most do not work! WD40 works like a charm! Don't ask how we figured this one out, don't remember."

It is a substance which is used commonly in cleaning ancient coins and valuable weapons and when vexed with verdigris on a coin WD-40 will do the job. "If not scrubbed after application" it won't remove the skin or tone of a coin or the bluing of a rifle.

Ben