The few times I tried striking up it was done with single cut smooth mill files, using chalk on the file, moving the file after each stroke so that a clean part would touch the barrel. The move is one long motion from the chamber to the muzzle. For the next stroke move the file a little to present a clean part, move radially on the barrel so a new "ribbon" will be filed and so one till all the barrel is done. Filing is followed by abrasive paper. I did it on single barrels. Doubles would need purposely ground files for the bits next to the ribs. The file is held at 90 degrees to the barrel axis.
I have seen professional curved files and curved blocks for abrasive paper. Also lately I heard of soda blasting used as a pre filing rust and bluing removing process.
Last edited by Shotgunlover; 10/25/15 03:21 PM.
