I have 3 Silver Dollars that look like they were at one time stuck together with road tar. The gunk is still very evident on the coins. Anyway to get it off or are these coins now junk?

Junk... please send them to me at...

I kid...

Cleaning coins is a touchy subject. Im sure I will be corrected if I am wrong but if it is THick gunk maybe try some off making sure not to scrape the coin... if that made any sense... Maybe give them a soke in .... oh here I go... Asitone? I think thats what the masses use to clean their coins on those rare times when they do.

second thought... someone else take this one, im not to much help, sorry

-Bobby

I cannot help at all so I will suggest this.
Take them to a dealer and see what they say. You can also show us pics of the coins so we can get a better idea about the black poop

The best thing you can use is acetone - that's all really... but again it depends what the black thing is...

Or minerail spirits will clean them up, dont scrub!!let them soak, I use Rubbing alcohol on some of my coins, no problems..

Acetone would be the better way to go. Other solvents may leave residue, remove some of the outer layer of a coin, or cause unwanted reactions.

Yep, if the gunk is petroleum based, mineral spirits would be a good soak, but no rubbing. Patience is the key. It could take days to dissolve the stuff or it could dissolve in minutes. Isopropyl alcohol may darken silver if the soak takes several days, but the darkening looks like natural toning usually.

Ammonia, turpentine, vinegar and several other cleaning solutions will remove toning or otherwise react badly to the coin surface, but acetone and mineral spirits will not cause any reaction on a 90% silver US coin, in my own experience.

Dont clean, conserve

Use a couple of these with plenty of elbow grease.

Pictures of the gunk (I hope).

Is that tar?

WoW that is definitely gunk! If it is tar, you probably can remove it, but what will it look like under there?

I'm pretty sure that's what it is. How successful do you think I'll be cleaning it off?

This is not indicative of my collection. These are just 3 found coins in my Grandson's "collection".

Gosh I don't know, I hate to tell you to try something and have it make them even worse.