I wanted to avoid acid if I could, especially after viewing Randy's video above using sandpaper. Not knocking acid, but I figured if something else would work, that might be easier. I bought a 1-1/2 in. Cylinder Buff Bob from Harbor Freight that worked so well, you would have thought it was designed for the MS440's particular bore size. Considering your bore is slightly larger than mine, this product should work great for you as well.
My cylinder wasn't too bad, so I skipped the sandpaper step and went straight to a heavy duty scotchbright pad from Home Depot, wrapped around the Buff Bob. I then spun it with a drill inside the cylinder. Talk about perfect. The previously scored cylinder had a mirror finish when I was done. Here you go:
http://www.harborfreight.com/1-1-2-half-inch-x-2-inch-cylinder-buff-65000.html