The Overseer mask from the video game Dishonored is one of my favorite props from this game. I sculpted the mask using Apoxie Sculpt over a Pepakura papercraft model. It's cold cast using brass powder to give it the look of real metal.

With the master sculpt complete, I gave it a coat of Rustoleum flat gray primer. This was mostly to give the sculpt a surface that wouldn't cause problems with curing inhibition of the platinum silicone I was planning to use. I was careful not to use anything on the sculpt that I knew might be an issue, but just to be safe I put the primer on it anyways.