The frame is aluminum. If you powdercoat it you will get an orange peel texture in a couple places. Its normally towards the ends of the tubes, near the headset areas. You don't notice it unless you really want to. If you're fine with that, then powdercoat it. Otherwise, ask around at autobody shops, they can paint it.
The fork is carbon fiber, I have no idea if they can even powdercoat carbon. Ask around.