Last weekend I went to the Connecticut River Museum in Essex, Connecticut, there is a temporary exhibit on early shipbuilding now. In one of the exhibit cases was a fine New England fowler, French style stock, some home made parts, steel ramrod, the works. It looked to date to around 1770 or so. One thing I noticed was the barrel, it was black, and seemed to be thinly coated with something, like a black laquer. It looked like an original finish to me as it was even, smooth and well patinated. Does anyone know what I was looking at? Were barrels ever covered with Japanning or a type of asphaltum? Any thoughts?