Whit very diluted and thin (transparent) silicone + coloring pigment (black + 1 blue + 1 gray + black agan) -> a LOT thin layers I experimented a lot and taken a few ideas from car polishers.
The 'transparent silicones turn 'opalescent' and a little whiter. Link to the work progress of the Pred Skin -> to see, how the paints and the layers lookt ower time. I used (werry) hi quality oil paints (transparent + semi-transparent, this has only coloring pigments and only a little transfer subsracte) I ordered a Smooth-On Silc Pig - Silicone Pigments
I used a few colored (Black, brown, red, white) and a LOT transparent. I tried out a few, but the best was this household silicone.