So, i'm really having trouble with this.
First colour scheme - decide to go with the Progs whitey/blue tones. Looks crap.
Second - go with a dark flesh then highlighted to bring out the detail. Too brown.
Third - drybrush the hell out of it to get rid of the brown. Use Games Workshop Rotting Flesh followed by Bleached Bone. Too stark a contrast between the highs and lows.
Fourth - tone down the highlights with a red/green ink wash.
That's got me to where i am now - a sort of boiled flesh effect. That's starting to work so i'll persevere.