To paint him in a brighter red as demonstrated above, I suggest blood red mixed with mechrite red, or mechrite red highlighted with blood red. For my berzerkers, I undercoat them with scab red then go over them with mechrite after inking the detail lines black. Then I go over them with dwarf bronze/boltgun metal as the metal requires. At the end, I wash the whole model in chaos black heavily watered down to create a grittier, darker and (I feel) more realistic looking model. This also allows me to use blood red to create visible blood spray patches on the chest/arms. Good luck with your lord!