I have to admit that I enjoyed painting these far more then their more powerful kin, the Blood Warriors. The paint scheme stayed pretty close except obviously not as good as what the GW painters can accomplish.
The one exciting painting idea that I gained from the Age of Sigmar core book was for the painting of flesh. Per their outline, after completing the base coat, then the initial shade of Agrax Earthshade, they recommended painting Druchii Violet into the crevasses. While I admit this will need a lot more practicing, I was happy with the results.
It helped achieve a very sickly and tainted look. Certainly not a concept that I think will transfer to my Astra Militarum projects, but I intend to start using and refining this for my Chaos Hordes, both AoS and 40K.