My nephew, who is a knifemaker, does beautiful finishing of damascus blades with no visible erosion or etching of the blade. He briefly submerges the blade in muratic acid, quickly washes it then immerses the blade in a very saturated solution of tea and leaves it a couple of days. Out comes a beautiful black and white blade. I have thought of trying this same with barrels. Shouldn’t be much different results.

John McCain is my war hero.