I found a pretty nice piece that may be of interest to me besides the fact that someone dipped the coin in some sort of paint or I’m unsure if it’s artificial toning? I don’t have the coin in hand so I am not sure and neither is the seller. Is there any safe way of removing this without harming the coin or chancing it? I will only pursue it if so but if not I don’t want to waste anyone’s time! Thank you in advance!