I got my hands on a pretty cheap Burning of Prospero boxed set and with 30 mark 3 marines to play around with plus my assorted left over bits and pieces from a few other projects I embarked on a 30k Death Guard test painting session.
I started with the standard base coating via an airbrush, Brown followed by a zenith grey highlight and then of course a strong white zenith highlight. This was all then heavily washed with Sepia Brown. After the Sepia was dry I gave each model a vigorous drybrushing of Pallid Wych Flesh.
The green I was looking for the shoulder/legion marking was very much a departure from the usual drab washed out colors many others typically choose for 30k and even 40k Death Guard. I wanted something that would stand out and look particularly infectious and virulent, I ended up using Warp Stone followed with a green wash and then a thinned follow up coat of warpstone to get the desired green I was chasing.
I am still testing a weathering method/color I am happy with and will report back soon!