Gentlemen,
Dug what I suspect is a Piece of a Ground burst Confederate 24Lb Howitzer Case Shot. It still has some Sulfur matrix as you can see, and has a few case shot still attached. I want to prevent any further Deterioration. I have asked a couple people, and some have said Polyurethane clear coar the whole thing, while others have said Slow electrolysis. I am wondering what you all would do