I experimented spray painting carbon fork directly from spray can enamel paint (4 layers total). The fork was a yellow Krestel EMC in almost perfect condition. I sprayed it with red without sanding or priming. End result is only so-so. Biggest issue I found is the orange skin looking texture at the end. I guess the pressure of the spray can was not high enough to dispense the paint uniformly onto the spray surface.
I think you'll need some sort of commerical spraying equipment to get the job done nicely.