Cheers all paints are GW
The weapon team was base coat black, tin blitz, dwarf bronze, sepia wash, more dwarf bronze highlights poss even a little chainmail added for final high lights. The verdigris is 50/50 hawk turquoise and dark angel green watered down with water to make a wash. Slap it all over the bronze and use a brush to take off the excess so it pools where you want it. The technique is based on the GW guide to painting the screaming bell on their website.
The rat ogre was just boltgun metal and a heavy delvan mud wash.