Nice job!

For filling areas like that lady, look into a product called Apoxie Sculpt. It is a two part epoxy that cures harder and stronger than rock. You can sculpt it easily and smooth it with a wet spatula/finger....It can be sanded when cured and accepts paint/stain readily....You can get it from most taxidermy supply co' s including WASCO. Now, it is expensive so only mix as much as you need....