I have some blackpowder doubles that have been neglected over the years. I keep scrubbing and cleaning, but it seems to keep coming. Not that I'm lazy, but does anyone have any suggestions to ease the choir. It is mostly lead and powder fouling. The rifling is coming up pretty good so I want to keep going. I think they are looking pretty good, spray some ballestol down the barrels, let it sit, and pass a patch through it and more comes out, and back to the begining I go. Any help.