I wasn't sure what to do for the woad when I started painting, so I actually finished the face in regular flesh tones first, using Reaper MSP and Coat d'Arms paints. The base skin is a mix of MSP Tanned Skin and CdA Suntanned Flesh, shaded with CdA Rat Brown and highlighted with MSP Pale Skin and Bleached Bone. The woad is several glazes of old, old Citadel Colour blue ink, from the original expert paint set (I recently found a box of my 25+ year old paints while cleaning out my grandmother's basement - Most of them were still perfectly usable!). I had to clean up the highlights a little bit with a mix of the MSP Bone and blue ink, but it's largely just a glaze of ink over a fully painted face.