I'm working with a new product, Smooth-On 325 resin. This stuff is great. I am able to tint the resin to a translucent fleshtone with their compatible tint. The heads were not "painted" per se using the usual undercoat/ pastel method, just pastels. The effect is more lifelike, with a greater depth than traditional paint.
This is a "before and after" shot- The HS on the right is fresh from the mold, left is a pastel tinted HS.
Two finished sculpts
