This may be slightly off topic, but after trying a number of times to do Damascus barrels I just pay the piper - Brad Bachelder [ a master gunsmith in Grand Rapids Mi ] . All his work is first class, whether it's Damascus, fluid steel, or color case harding. One time after I ask about the process of doing Damascus barrels he commented that different barrels from different makers took a different solution. He does many barrels at one time, but all from the same manufacture. He claimed when doing Parker barrels, it made a difference if they were pattern, twist, or laminate. So, like others have said, it's a learning process - good luck to all of you who try.