i'm not too sure of GW colour scheme but I would use Agrax earthshade, nuln oil, kantor blue, abaddon black, boltgun metal (can't remember the new name for it
) and warplock bronze.
dry brush the armour and weapons boltgun metal
light dry brush of kantor blue on cloaks, cloth.
heave wash of badab black on kantor blue
light drybrush of warplock bronze on armour for a sort of rust effect
heavy wash of agrax earthshade on metal bits
highlight metal with boltgun metal and cloaks with a 1:1 of kantor blue and abaddon black.
thats how I do it or if you want just use the paints on the back of the box if you have it.