Thanks guys,
regarding the recipe questions;
Faces, I usually start with basecoat of (old) citadel Tallarn Flesh, (old) citadel Delvan mud wash. Depending on how this turns out I'll go back over with Tallarn and finish off with a very thinned down (old) citadel Elf Flesh on the nose cheeks and chin at least.
With the Chi Ro I used Vallejo Sky grey and had to go over a few times with Vallejo White.
Thanks for the comments and questions!