Black Spots.

Yeah, that definately sucks..... as has been said here before... "They are death to other coins"..... and I keep them seperate from the good ones. Bad apples can spoil the whole bunch ! I don't try to clean them.....I just don't use them....but I still keep them !
Oxidation is basically "metal removed" and gone forever.....depending on how bad it is.

Posted - Yesterday : 9:26:48 PM
Soak in Dill Pickle juice .To make stronger add vinegar .
Seeking :Don't laugh it works (Try it)
Rainman

I know you must be kidding but you have to add a smiling face or someone may actually try that and ruin a great coin. Similar to Especially the Vinegar part. Everyone knows that this contains a minimum of 4% Acetic Acid and that will actually quickly combine with any Copper in a coin to form Cu(C2H3O2)2-H(OH) or Cu(CH3CO2)2-H(OH)= Copper Acetate, depending on how long of an exposure.
Pickel juices are as eratic as any product where you have no idea in the world what it contains.
As noted almost any Acid could substantially ruin a coin.
As to the use of Olive Oils on any coins for any reason. DO NOT DO THAT. That product is an Oil and will leave a deposit on the coins. Then you would have to use Acetone to remove that and then rinse with distilled water.
IF, and I stress IF, you are not very concerned as to the value of a coin that has spots of any kind and Acetone does not work, in my many experiments I have found a product at Walmart that is sold in the jewlery department for cleaning jewlery. It will take some of those spots off a coin but will really make it shine and appear as harshly cleaned. But will take SOME, not all of those type of spots off. And, that coin would now be considered CLEANED.

Rainman might be the fellow that the other day said "he puts 82 pennies in his mouth to see if they are zinc.

You must of missed the other thread then. One guy will put 1982 pennies in his mouth to see which one is copper, apparently he can taste the difference lol...

Rainman: Not picking on you. Just mentioning that if your joking you should put a smiling face or something so new to the forums or coin collecting will know. And if your not joking, please, please look up more statistics on what your saying. As noted, yes, it is POSSIBLE to remove those spots but not without damaging the coin and sometimes excessively. If those spots are now part of the coin due to a chemical reaction, then the removing of the spots removes part of the coin. You could even use a drill and drill the spots off and out and they will be gone. An Arc welder torch will also remove the spots.
As I said you are not being picked on. Just explaining the actual statistics of what is being said.
And as for Pickel Juices or anything else that is or may not be consistant. Remember that every jar of pickel juice may be completely different than the last one. Even during the during processes of Pickels, each batch may differ considerably. This would indicate that one batch may be considerably more acidic than the last. This is why what may work for one person once may distroy something that others attempt the same way.
Know your product.

Rainman,Was just jokeing around,sorry if I was out of line.

Just to confirm, Xylene doesn't remove the black spots either. But it does seem to improve them a bit.

Just to confirm, Xylene doesn't remove the black spots either. But it does seem to improve them a bit.

I'm not sure exactly what you mean. Are you saying the Xylene improves the black spots? Why would you want to improve the
spots? I thought it was the coins we were conserned with.

learjet: I don't know if your old enough to remember but at one time in our history, I'm old so I was there, we used to be able to buy Chocolate coins. I'm not sure but I think there was some of each denomination wrapped in Aluminum foil. Sure wish I save those.