I have not tried this, but the best products, as far as I can tell, are from Alsa Corp, and Rage Products. It looks about like highly polished aluminum.

I've been told to shoot the parts black, and finish with a catalyzed urethane. Sand and buff the parts to a "glass-like" finish, then shoot with the "chrome", and finish with a special clear. I know the paint is supposed to be somewhat pricey.

Maybe someone here can tell you if it's actually less trouble or expense than plating.