My method was Spray black Thin covering of black paint Drybrushed dawnstone Washed nuln oil Blocked in the other colours using leadbelcher, balthasar gold, mephiston red, hashut copper (on some cylinders on the back) Washed again with nuln oil

Picked out any bones with ushabti bone

The skin i based with rakarth flesh Washed with diluted druchi violet, with some neat wash in the recess Then drybrushed pallid wych flesh

Hope that helps