I used Secret Weapon Flesh wash and then layered Vallejo Flat Flesh for the main body color. Teeth and eye whites came from P3 (Bone Jack, Menoth White, Menoth White Highlight). Vallejo Rose Flesh, washed with GW's Ogryn flesh and highlighted with Vallejo Rose and Salmon Rose. Inside of the multitude of gullets (except for the main gullet) was hit with GW's Leviathan Purple to give some definition and depth to these shallow cut outs.
I liked the skeleton inside the main gullet although I eventually went with a bleached bone look rather than a digestion in progress look so that it could be more easily seen. Overall this is done with very warm colors so contrast is low. In retrospect I might want to use some powders on the skeleton to grime it up some and give it that rotten texture.
Here you see the Eldritch Demon in its Flat Flesh base coat wash. Adhesion was weak in places, notably under the left forearm and, oddly along the middle of the upper wing surface.
The head, tentacles, suckers, and wing holes were addressed with Vallejo Rose and Salmon Rose and then most of the figure was washed with Secret Weapon Sewer Water. The Head and Belly have a transition zone that is both the Flesh treatment and the Sewer Water Wash and seems to work. The Sewer Water washed areas were given a very light dry brush highlights of flat flesh to illuminate things.
Tentacles the Rose/Ogryn Flesh/Rose/Salmon Rose process. The central orb has uneven Iron Oxide with orange and yellow lettering then a blood red central dot with orange lettering. Its all pretty legible and I like the semi submerged look of the characters on the yellow part of the orb. Eyes for all these Demons are blue because Demons with blue eyes are creepy!