Removing tool, Chatter marks from the inside of a black powder barrel

I do not know I have never tried, I have kicked around different ideas, Polishing wax and patches and have thought of valve compound and patches, goes without saying the patches would be attached to brushes, NO drills/dremels I think they would take to much. For the 1:66 barrels. Jukar, Dikar the ones that just look awful and need a little TLC. I am very open to Ideas, suggestions, different input

I've lapped barrels with rubbing compound on a patch wrapped around a bore brush. 100 strokes in and out, followed by an oiled 3M "green scrubby" the same. Then a while back I heard about "Lead Away" cloth and ran some patches of that down the bores of both the Deer Creek rifle and the T-C. It made a huge difference in ease of loading.