The material is Shapeways Versatile Plastic.
I painted it with black primer, then gunmetal, and then black again to give it the “cold metal” texture of the official CG.
The “rust” is hand-applied with Copper paint by dry-brushing.
The material is Acrylic from Shapeways.
I applied a transparent primer to it, then applied white pearl only to the center of mask for it would not be “too transparent” and make the shape difficult to see,
and finally used pearl blue, emerald, and purple to express polarization.
I have always wondered who the spectral mask is. Could it be the spirit of Lhikan? Probably not. These are really cool masks! And great editing on the photos!