This is a real brief update so I'll just outline my current steps in the batch painting process.
(A process I'll note that is like entering the 7th level of hell)
I primed the models black as you can see here (used character model since I forgot to snap photo of black primed Bestigors).
I next batch painted the entire unit using Scorched Brown - I covered skin, horns and hooves with the color.
I then used the Foundation Paint - Tallarn Flesh to cover the areas of skin - a real fast paint with only 1.5 thin layers.