When I got my GI last month I was very happy and content with it.. after about 400 rounds I figured it was broken in enough but I still could not get consistent results at the range. sometimes to high sometimes to low. and quite a few fliers.
The barrel bushing was way to sloppy for my liking so I got a NM SS bushing and fitted it in. while I was at it I polished the barrel hood and the first 3" inches of the barrel end.
The hood was getting some scuff marks that looked kinda bad to me.
I used a fine bristle wire wheel to remove the parkerizing and then used Mothers Mag Polish and a buffing wheel to clean it up..
it is much more consistent now and I kinda like the way it looks to.. (similar to a Mil-Spec)