Mine is done brushed aluminium look on fibreglass. It is aluminium powder mixed in resin, thinned and sprayed on. Wet sanded smooth and scotchbrited. In the pic below I had the stripes polished (as you would regular aluminium), but it doesnt come up as nice. Ive since put on black vinyl stripes. It was a bit of work but very cheap to do and has been on the car for about 5 years.
