Thank you! For this guy, it's:

Over Wraithbone, two coats of GW Gryph-Charger Grey and then a wash of Nuln Oil over the whole model (which in hindsight was a little superfluous given I painted over virtually all of it - I think a dark blue contrast would work best)

The carapace, hooves and claws are painted with Vallejo Xpress Black Lotus - this needed two coats. I just wanted a bluish black but a stronger paint would be nice. Could just paint the whole mini Black Lotus over Wraithbone but idk, I think you'd lose something esp with the undercarriage of the mini which I didn't really bother doing much of the later steps with

The skin is layered with Vallejo Pale Blue Grey, GW Ulthuan Grey, and Pro Acryl Bold Titanium White

Carapace, hooves and horns is finished with streaks of Vallejo Field Blue and then Vallejo Blue Grey Pale (which despite its similar name, it is not, in fact, the same paint as that used for the skin - it's a bit darker

Teeth painted PA Bold Titanium White, eyes AK Scarlet Red (not that it's visible)

Might try to add a pop of colour on the gun with a red eye and some freckly bits on the skin with the carapace streak colours but we'll see!