In between getting called out to a fist fight on facebook and standing out in the mid day sun for two hours a day, I've done a tad more work on the Ambull idea.
I finished the base coats and put a few highlight layers on the Spunk carrier.
And I tried to clean up and put together the two Knightmare Games Ambulls I have from their Space Raiders line.
In the interest of time I did not pin the arms. Usually I live to regret not pinning but I'm open to repeating my mistakes.
People have been commenting with lots of good ideas, keep em coming. Airbornegrove sent me a link of a very nicely painted Ambull on the Oldhammer Spain blog here.
It appears that the general idea is some kind of overall earthy color on the plates with a bright, contrasting color on the soft fleshy areas.
While doing a Google Image search I stumbled upon this post from The Bearded Quail. In it he talks about the history of 40k and how they double purposed fantasy figures they had lying around to be the menagerie of Space. He also diplays an enormous 3D printed Ambull that somebody in the States makes, but what really caught my attention was this page from WD99.
I'll be reading it through and see if there's anything I can use for my scenario.
Also I'd like to welcome Phil Curran to the blog. I didn't see a blog listed in your profile. If you have a hobby blog I would be happy to link to it.
Thanks for looking everyone.