The one problem with airbrushing (or spray painting) the armor, is that it won't wear well since the layers are thin and won't tolerate "wear and tear" if you intend to use it often.
A chrome-like finish with Alclad can produce great results on a static object like a scale F-104 or P-51D, but once you start wearing it (packing, transporting, wearing it at events, etc.) the finish will become damaged.