I would NOT dip it. I would carefully conserve it though to make it more eye appealing. Though I'm no expert so I would work on a lot of other cheaper coins to build experience at that sort of thing.
That ones bad enough I'd pay someone else to do it, but yes I would attempt to have that coin conserved
Dipping would make an ugly coin worse. The most I would do would be to soak in some solvents and use a sonicator if available to loosen the darkness.
Unfortunately, it's been messed with already. I would just leave it as is or maybe sell it to buy a better one. It is a nice Civil War date though, so I'm sure someone would want it to at least fill a hole.
I don’t like the surfaces either it’s not original and has been dipped or cleaned for sure once dipping this one would be a disaster. Maybe try acetone and see if the black came off
Wow, whatever you do, be careful. Professional conservation might be expensive, so measures you can do would include first rinsing/soaking in acetone to take off any organics and then soaking awhile in distilled water to loosen any grime or grit. Careful prodding with a toothpick might take off some of the black, and careful use of eZest with a cotton swab only in the dark areas.
It’s a $250-275 coin in xf which is where I grade it with good surfaces. Hope acetone gets the black off. Otherwise I’d unload it cheap or try using it as a pocket piece and wear it off. You might lose a grade but gain surface quality
I would dip it and try to remove that black corrosion if it were mine. Try to get those surfaces all blast white. At least start with an even color/look. Then put it in a windowsill and forget it for a couple months. It will always be a problem coin, so why not make it a decent looking problem coin?
Thanks for your opinions. I will try an acetone rinse followed by distilled water and possibly localized stripping with a cotton swab and stripper. And look for a replacement.
You can try but I wouldn't bother. I agree that it's already been dipped, and harshly cleaned, mechanically, on top of that. So no matter what you do nothing is going to help it. I'd just sell it as is and move on.
I would try. However, it's been harshly cleaned before. If you remove the gunk on the surfaces, it may expose the cleaning even more.
I would first put it in some strong solvent and use a q-tip (or similar) to get black gunk off of it (as much as possible). If it is still spotty after that, then I would "dip" it. Nothing will make the coin "original" again, but you could certainly help it look a lot more presentable.
The black stuff could be goo, crust, or staining. If goo or crust, it might be able to be removed with solvents and/or careful application of a rise thorn or cactus spine under magnification, but it's not going to be an attractive coin when you're done. If it's staining, then don't waste your time trying to remove it. Just sell the coin and move on.
Or you could buy this "gorgeous" coin https://www.ebay.com/itm/1862-S-U-S...162692?hash=item2857c41f44:g:DYQAAOSwv7da0qTp