Spined Chaos Beast WIP

Here's the next model in my line-up as part of the escalation campaign.  I'm going to use this guy as a giant chaos spawn.  It's huge!  I'm painting the base separate but it's a flying base and he hangs over the end with his face.  As for colour I didn't want everything in the nurgle army to be shades of green (same reason my trolls are blue) and I've never done purple so I figured now is the time.  I've just basecoated him while I decide how to highlight.  I'm thinking spacewolf grey.