First off, a heavy drybrush with Vallejo Game Color Tinny Tin. I have to say, where has this paint been all my life? I can see myself massively overusing this paint: it's a wonderfully dark, moody metallic colour.
BlueForge Terrain, with a few custom cracks added.
You can see the verdigris here! (You can also see blogger being a pain and refusing to centre my photograph...grrr)