Just an update for everyone - i had a go with my airbrush last night and i'm quite pleased with the results. The metal flake seemed to work ok, i tried mixing it with some paint first but then decided to just try it on its own and it was ok. The nozzle is probably a bit small but only because it takes a while to paint a whole shell - i guess a bigger nozzle would cover a bigger area?
I'm hoping to get it finished tonight so i'll put a photo up when its done
