First of all, I'd like to say how frustrating it is to a) leave a coin I have a great deal of interest in (and leaves me in a constant state of excitement) in distilled water FOR SO LONG!!!!!!! :desk: Geeze!!! I mean, it's only been in it for three days and I'm already going crazy. The thought of six months of this kind of torment makes me tense. and b) take the best pictures possible with my little digital camera that doesn't even have a micro option, and whose manual focus is hardly worth noting. so, lots of head banging against hard objects. :headbang: HOWEVER!!! the point of this thread is either for you to yell at me for destroying this coin's patina or to encourage me to do whatever i'm doing, because in some way or another, it's going in the right direction. Here's the coin! I think it's a silver!!!
The coin is bronze, BUT the whiter part isn't patina, its the remains of the coins original silvering (thin silver wash). Can't really blame you for damaging it, it looks to be incredibly fragile. In this case, it may even be better to remove it entirely. Don't take my word on it though.
I think it would be best to remove it all together at this point...like above, just my opinion but I think its better to have a naked coin than one with spotted areas where there isnt patina left...this coin might be a good candidate for a zap to just take it all off. Either way, I dont think it will be pretty
By the way. Your coin looks like Constantine. The reverse legend would read VICTORIAE LAETAE PRINC PERP