I was chuffed with the metal on this render! Its a HDR map with no lights in the scene at all! The metal is just a maya blinn with really low eccentricity and really high specular roll off. That gives the metal a really smooth, ultra shiny look, that really picks up reflections along the bevels of the model. Those bevels took ages, so i`ve got to show them off!

You can see here how I plan to rotate the arm to simulate a human forearm twist. I`ll explain more on this later, but basically each section rotates just a little bit so the twist is spread out over the arm but the sillouette remains reasonably flush.