So, I've been working to get my army all painted after having a mostly grey mess for about 3 months now. I've successfully painted Mortarion and Typhon with Forge World's guide (Prime white, watered down Seraphim Sepia, etc.), but this is a rather irking color scheme for already assembled models (I got a bunch in a trade

). I was curious if anyone else had experience painting death guard before, and if either of these schemes would work as the base for the white armor:
1) Paint them like Deathwing Terminators, but stop after ushabti bone, wash with watered down Seraphim Sepia as the base color.
2) I've heard a lot about using rakarth flesh/dheneb stone, but I can't see it, any help?