If this is something for you:
I painted on a base coat of Steel Legion Drab/Graveyard Earth.
Solid layer of Emperor's Children.
Healthy wash of Druchii Violet.
Putting on Emperor's Children in three to four wet layers, all in one go.
Same with Fulgrim Pink.
Quick, easy and has the advantage of working on black primer like a charm without having to worry about the woes of white paint.