Lord-of-PTabs
Full Member
- Joined
- Jan 15, 2014
- Messages
- 105
So i found this 1931 silver Dutch coin ( im in NL).let it sit in electrolysis for a few minutes,then brushed with a soda. The result wasnt too bad but, the next day the coin was covered with black stains. Is the air causing this reaction? Can i avoid it? Vacuum?
The next day...
Tnx for all replies.
The next day...
Tnx for all replies.