It's not actually stuck to the base so I was able to get underneath for all the bone and chitin. I then added the first sepia shadow wash, with a strong tone wash to follow.
The head was also brought up to speed and with a little more effort it'll slot in alongside the numerous spare Carnifex heads I've also had on the go.
It's pretty much just an oversized Carnifex head afterall.
So the Tfex is now in the same state as the rest of the Tyranids I got primed - the Hive Guard conversions, the Warrior and the DevGaunts [although they've had some highlights]. More floating projects I'll dip into, or use to avoid, when I'm stuck on something else [Lnnd Raider Redeemer].