I saved him til the very end. This is a beautiful model, and he was a ton of fun to paint.
His skin is Screamer Pink, layered with Wazdakka Red, layered with Evil Sun Scarlet, and then highlighted with Tau Light Ochre.
His/her wings are basecoated the dark purple, layered with the 2 lighter purples, with a final feathering of Slaanesh grey. (I apologize for not knowing the names of the purple paints yet!)
For his final highlights, I did a scale effect rather than a block of color. I think it turned out well.
A close up of his head. For his horns and his spines, I used the same colors as his wings, but did a final highlight of Pallid Wych Flesh (which is still purple btw.)
A close up of his wings.