THE PURGE
Armor: Catachan Green, wash with Flesh Wash, highlight with Catachan Green, 2:1 mix of Catachan Green and Rotting Flesh, then 1:1 Catachan Green and Rotting Flesh.
Black Armor and Combi-Weapon: Chaos Black highlighted with 2:1 Chaos Black and Rotting Flesh with a final highlight of 1:1 Chaos Black and Rotting Flesh.
Tusks: Chaos Black highlighted with 2:1 Chaos Black and Rotting Flesh, with a final highlight of 1:1 Chaos Black and Rotting Flesh, followed by straight Rotting Flesh.
SIlver: 1:1 mix of Boltgun and Chaos Black, highlight with some Chainmail, wash of 1:1 Chaos Black and Snakebite Leather for that dirty, oily look.
Gold: Tin Bitz, progressing though Burnished Gold, Shining Gold, then a 1:1 mix of Shining and Mithril. To tie it all together and crust it up, wash the gold with thinned Scaly Green.
from the gw web site, heres the link
http://www.games-workshop.com/gws/content/article.jsp?categoryId=cat1300042&pIndex=1&aId=1200011&start=2
