I've started painting the front zombie and the stuff that goes on top separately. I've documented pretty much all the major steps I do when making something like this, so next posting will be when the whole thing's done.
Here's it is in its current state:
Oh yeah, I've got some detailling planned for the back. Yes, that hole will be covered!
The front will look a lot more interesting once I add the blood splatters and the impaled zombie.
Brummie, you are a mad genius...
(To be painted once it's hardened...)