Got a problem browning a barrel and hope you all can help. My GM barrel has a spot on it that will not take a good browning. It will lightly color but not go dark like the rest of the barrel. I have cleaned, sanded and browned this barrel three times with the same results. Twice I have tried browning with Valley Forge and this last time with Dangler's, this last time I even bead blasted the barrel before sanding and cleaning. It always blotches in the same spot, about an inch back from the muzzle on the left side flat. The rest of the barrel comes out a nice dark rich brown, this spot is a medium brown. Any thoughts and ideas? I really want to get out and shoot this flint barrel to see how it does, but this browning is really starting to agrivate me. Thanks, Rick.