Hello there!
I need your advice. I have few plates that have not been varnished for a while now. I see that oxidation is started. Is there any way to stop it and keep the plates, at least in the state they are in now?
The changes on the image are not easily recognizable, but, since i know them well, i can tell that the oxidation started. A little fog on the corners, color shifts and all that.
Thank you in advance