The fact that almost nothing sticks to platinum silicone is usually a desirable quality. However, it means that most paints will not stick to it, either. We have a paint base system available for our platinum silicone rubbers (like Dragon Skin or Ecoflex) called Psycho Paint™. This is a translucent base that our Silc Pig™ silicone pigments can be added to.
Psycho Paint can be applied with a regular brush or can be thinned down with a solvent like our NOVOCS Gloss or NOVOCS Matte silicone solvents and sprayed through an air brush. Below is a video on how to use Psycho Paint: