Some different Troll Skin/Flesh paint recipes.
With Ak Gen 3, Vallejo Game and Model color and Citadel paints

1. Blue Skin (Troll)
   Primer : Zentinal
   Shade: Imperial Blue + Black 3/1
   Base: Stone Wall Grey + Magic Blue (Drop)
   Layer1: Pale Blue + Stone Wall Grey 1/1
   Layer2: Stone Wall Grey + Dead White
   Final Glaze: Magic Blue or Blue Wash
2. Grey Blue (Troll)
   Primer: Black
   Base: The Fang
   Shade: Black Wash
   Layer1: Elfic Blue
   Layer2: Fenrisian Grey
3. Inflamed Flesh
   Primer: Black
   Base: Cavalry Brown
   Shade: Glistening Gums (Wash)
   Shade 2: Druchii Violet
   Layer: Cavalry Brown + Dark Sand
4. Genestealer Cults Flesh
   Primer: Pale Grey
   Base: Daemonette Hide
   Shade: Druchii Violet
   Layer1: Slaanesh Grey
   Layer2: Warpfiend Grey