Base coats of lead belcher and warlock bronze followed by a wash of nuln oil. Then edge highlight/ spot hit with typhus corrosion. Go over the whole thing with a wash of agrax earthshade. Dry brush with mournfang brown and then ryza rust. Lastly is a mixture of half agrax earthshade and half seraphim sepia. https://www.reddit.com/r/Warhammer40k/comments/5f7085/first_time_painting_orks/