The corset on this outfit is black-and-blue scale mail. The mail was made separately, then sewn onto the corset by hand.
The skirt is primarily chain mail with scale trim. The waist is part aluminum, part rubber mail, and includes small hooks to help it fit as well as possible.
The headpiece, necklace, and earrings are exclusively chain and scale mail. I particularly love the fluid pattern he used on all three of these -- some of my favorite pieces!