Jason, my point of view is...
Once something is painted, sooner or later it one day will eventually need to be REpainted!
The FW is naturally corrosion resistant and fairly attractive the way it is, not to mention easy to clean.
I am leaving mine the way it is.
However, any one of the painting processes we use for the aluminum typically could be used for stainless. Pick one and look over the data sheets.

CJ