I have polished my own back when I had the GT550 engine. They came out great, but I had a lot more free time back then and I remember it taking several days worth of work. Mine wasn't a well taken care of bike. It has many scratches and stuff on the cases.
I don't want to go the powder coat route for cost reasons and because I have a huge air compressor and automotive spray gun that I never use. I was going to spray my tank and frame with some good automotive paint. .
My case halves were already painted black, I was just going to redo it.. Or should I bead blast them and polish them up to?
I'm at a point with this cobbled together project that all the mechanical bugs were figured out last summer and are fixed or in the process. My next step is trying to make it look good. beside fresh paint and polishing it's getting a cafe seat, a half shell rear fender, new speedo, and new controls. Hopefully it won't look like it's from the Road Warrior movie anymore
Here is what it looked like before I started the engine rebuild.
http://imgur.com/a/0AeOP