I didn't like the mouth, so I really sanded it down. I used a small generic knife cutter to create a new shape of his mouth. I would suggest drawing the mouth first with a mechanical pencil and use a scriber for better results, then sand it down. I think I added the lower lip too, made from Tamiya epoxy putty. The face actually looks good now in person, but rough in close up, because this is handpainted. I'm planning to use Tamiya Gray Green Spray AS-29 for the face, once I remove the paint first with model acrylic thinner. The paint is expensive but I'll use it for other projects.