Hi, and welcome to the forum.
I assume you mean the iron THORN kabal and no the iron throne.
Without further ado:
Metal: lead belcher, shaded with druchii violet and highlighted with necron compound.
Red: Khorne red, edge highlights with eveil sunz scarlet, and jaekoro orange or bestigor flesh.
Blue/geen: incubi darkness, highlighted with kabalite and sybarite green.
Purple loincloth is : screamer pink + pink horror.
Gold: balthasar gold.
Shade with nuln oil and agrax earthshade to taste.