I feel pretty good when doing scenic painting on sets a props. It's not my strong point, but it's fun and works for my style of film. In the set painting, it's big with lots of washes and sanding and dry brushing and all sorts of things to distress and scale up everything. Fun. Character sculpting is much harder for me. The heads are about 2.5 inches tall and I will be shooting lots of close ups so they can't be as broad-stroked as my usual painting technique. That being said, I don't think they need to be precise or clean. I want everything to be a little rough (which ain't a problem with me at the helm).
I have been looking at a lot of paint work I like and something that I'm really into is non-realistic colors. A friend Brett Superstar (http://www.brettsuperstar.blogspot.com/) paints with some crazy pallets and you don't question them. Blue face with red highlights? Looks great! So I am trying to get some of that into the paint jobs.
On Gregor's head, I did a fleshy base coat and then lots of funky washes. Some red nose and cheeks and he's done. Now he just needs brows and pupils. And it's on to the other characters!