The Gut plate is NMM((Non Metalic Metal)).
How I did it was: (&like I said before I use a Wet Pallet)
Base coat of Bestial brown, then used a wash of Badab Black for my Shadows, then highlighted first with 50/50 bestial brown+snakebite leather, then again with just diluted Snakebite leather, then I did all the Bright highlights with Bubonic Brown. lastley I added a touch of skull white to the Bubonic brown and hit the bolt heads and few of the sharp edges with it..
I think I ended up with a nice aged Bronze Look..