After arriving at a pose that would work I began sculpting the figure in Apoxie Sculpt Clay. I'd work a section at a time letting it completely harden between sculpting sessions. I built the native up slowly carefully test fitting its position in Kong's mouth.
Once the figure seemed right I began painting it using acrylic paints. I sprayed the finished native with Testor's Dull Cote to give the fleshy areas a flat matte appearance. The eyes and mouth got several coats of clear gloss to give them a bit of a sheen. Next I made a necklace for the victim out of Super Sculpey clay. Then hot glued on a grass skirt. Here is a couple photos of the finished native.