I build a lot of furniture, so I have a shop do all my polishing, plating, and powder coating. They are called Best Metal Polishing, and they do powder coating. They can powder coat race car chassis, so I'm sure they can fit your stand. They are in Lilburn.
Call 770-921-7445 and ask for Tal Garner, or his wife Kim.
In all honesty, a good enamel or even epoxy paint is 80% as good, for 10% of the cost. I do this sort of stuff all day, every day in the marine industry and we have tried it all.
Chris