Thanks Jambrdly. It's not a secret.. it's just a base coat applied with airbrush of Tamiya DARK COPPER XF-28 acrylic paint. Then shaded with BURNT UMBER oil paint. Once its totally dry (a couple of days) I airbrushed a thin coat of Pledge Floor Wax. I also varied the shading (added some Burnt Sienna oils) on the lower collar half of the helmet to give it a slightly different tone .
