Well, got the pictures sorted. Don't mind the chaotic paint work. I was just testing for the right base color. I think I have finally found it now. It is not the color seen in the following picture, but lighter and more ripe banana colored. I think it's gonna look great when I finally start painting it correctly.
I also drilled several holes for the face quills. Need to do a lot more and the sculpt the raised bump surrounding the holes, so it looks natural. Using the reference from supposedly cast from the Stan Winston molds I will go over the bust and draw in and drill the quill holes in the right spots, so it becomes just right.
Having studied many pictures of the original Predator head I noticed that the upper teeth on the mandibles were positioned wrong. Basically... I had to switch them around so they sat on the opposite mandible, but then I had to fix the shape of the teeth, because they were sculpted to fit into their respective positions and didn't fit the other hole. That resulted in filing and then apoxie sculpting new bases for the two teeth, as well as adding more material along the sides of the teeth to make them more like the original. I'm not done with all that yet, but it's already looking better. Apoxie sculpt is difficult to work with because it's more rigid than sculpey and doesn't lay flat at the edges, but I'll get it looking right.
Positioning the teeth this way also makes it look more aggressive in my view and gives it that arrogant streak that the first Predator had in the movie.