For a powder coater in your area, do a search online, or check a phone book. If it is anything like up here in MN, you will find places that will only do large batch pc'ing, and won't do odd jobs for someone stopping by. I lucked out and found a person that specializes in odd pc'ing jobs for anyone that wants to come in.
Most of my small things I sent to a member on here, tomk1960, who does great work. He is up in Massachusetts, so not local to you either.
As far as what to have coated, if it is metal and is painted, it can be coated.

. For instance, your brake calipers are a fine example of a part that does well to be coated. Your pegs, fenders, swing arm, stands, and any other part can be done up to look good as new.
You are certainly in a club of naked wings...mine is even a touch further than yours at the moment. I cut my center stand off, and pushed out the swing arm bushings.
On a side note, what model JD is in the background? 3020?