In my opinion it definitely looks better brushed than polished. Plus it is accurate to how the gen was.
For mine, I used a bezel removal tool like this one:
Once removed, I used an old Tape Machine that just so happened to have a pinch roller that was the exact diameter as the inside of the bezel. I just ran the tape machine on slow, and held a titanium refinishing pad on top of the bezel while it slowly spun around. Took me about 10 minutes to get a nice, even, circular brushed look.