something I just thought that could be a cool idea,
Have you seen those crackle effect things? where its basically something you put under a layer of paint (although it may have to be used along side airbrush painting - as thats what I saw it in).
Then when activated the layers on top of it can be crackled and sorta flaked.
What Im thinking is you could try and achieve some sort of dark red/grey flesh thats crackling to reveal like a brighter red underneath. Sorta like a magma effect.
so like this:
But im suggesting using a medium to achieve the crackle and the magnam colour to pure red rather than include the yellowy spots.
AH FOUND
IT!
https://www.youtube.com/watch?v=E450lqMD7EI
In the video he uses a chipping solution, im thinking you could do the same but to create a look like the flesh is perhaps like stone and underneath contains like the essence or demon hound form