Another coin I acquired from a uncleaned lot. I can see some silver coming through in some areas but I am unsure what kind of build up is on the rev side. So I am not 100 percent on how or if I should proceed on trying to clear that up. Any tips or advice would be greatly appreciated.
That is a nice looking Probus. The obverse is pretty good. I'm not sure about the reverse though. I don't think I would mess with it if it were me. Who knows what is under there and you could end up making the whole coin look a lot worse by trying to clean that up.
It's some sort of corrosion. The bronze has reacted with whatever chemicals were in the area it was buried in. The point is, the raised stuff is not something stuck to the surface of the coin, it's part of the coin. Removing it would just leave pits in the surface.
