After picking up my Luke Saber, I was very disappointed that the hilt was not chrome plated, or even polished. Rather than settle for this quality, I busted out some sand paper and metal polish.
Step 1.) Tape off the areas you do not want to polish using masking tape, or duct tape. I personally polished the emitter ring, the hilt (not including the control box), and the bottom ring.
Step 2.) Sand the area with back & forth movements using 2000 grit sandpaper. It will take numerous pieces of sandpaper to accomplish this task, as the surface of the hilt has deep surface scratches out-of-the-box. *You can speed the process by first sanding with 1500 grit sandpaper, then moving onto 2000 grit.
How it looks half-way through. The ring around the control box hasn't been sanded at all yet, and the area behind I've just begun:
After you have sanded to your satisfaction, use a metal polish to bring out the shine. I used "Semichrome Polish" for this task. If after polishing the hilt/etc you still have numerous surface scratches, repeat the sanding process with 2000 grit and polish again. As you remove more layers of metal, the surface imprefections will also disappear.
Questions/comments? Let's hear it. :D