What rust preventative treatments were used to protect the barrels of American Civil War era rifles? The replicas and originals that I have seen appear to have a barrel chemical treatment that is more than just a layer of applied oil.
DONALD WALTMAN curious - Severna Park, Maryland, USA ^
Except oil finish, exists only solutions: brown or black finish (chemical or by heat, who knows?!).
Goran Budija - Zagreb , Croatia ^
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