I disassembled it to leave me with just the stripped barrel/receiver. I did all of the polishing with a bench mounted buffer that has 8" wheels. I used Eastwood stainless steel polish on a sewn cotton wheel to do most of the cutting. That actually brought it out to a nice shine. I did a final buff with a loose cotton wheel using white rouge.
The barrel/receiver was the easier part. It didn't really have any bad machine marks in it. The frame was a whole different story. I guess since it is stamped, the actually stamping puts marks almost like ridges that run from front to back in the piece. Getting those polished down smooth took a bit of work.
I guess buying equipment for one gun doesn't make sense, but I already had it. I bought it years ago to polish out stainless and aluminum Harley parts. I've used it on other guns, though. I have a revolver that I mirror polished the cylinder on and then polished the frame out to a bright brushed finish. I also have a Remingto 700BDL that I just had reblued. I did the polishing and then had it dipped. It looked like chrome before the blue dip. The gunsmith that did the blueing seemed impressed with the shine I was able to put on the gun.