I got my 835 about 12 years ago. It has the sprayed-on blotch camo. The inside of the barrel looked like a smokestack with what I believe was overspray. Patterns were ok. but not great.
I took a 3/8" dowel, and cut notches into one end to hold some 000 steel wool in place, and chucked the other end up in a 3/8" drill. Then I fired up the drill and worked the steel wool (lubed with WD-40) back and forth until the barrel was clean and smooth. Patterns improved considerably.
Later I found an old aluminum cleaning rod whose handle had been broken off and used a 20 ga brush (in a 12 ga barrel) wrapped with fine scotchbrite pads to accomplish essentially the same thing in other guns.
Note: IMO it is not generally necessary to polish the choke, but I would keep a choke in place during the operation so the threads are not loaded up with crud. I mark the rod so that I only burnish to the beginning of the choke.
Last edited by keyshunter; 03-11-2011 at 04:15 AM.