After you mix the Sienna, add a tiny drop of dark brown to the paint and then mix again.  You should have a dark yellowish color now.

Start going over the lines of the face, any creases, the inside of the ears and along the forehead where the hair meets the skin.

Once done, the head should look something like this.  Don't worry if it looks slightly yellowish, the next steps will change it.

This tutorial is not complete.  I ran out of space on my memory card for my digital camera while I was doing the tutorial and instead of stopping the paint process, I just finished the heads.  I do plan to finish up the entire tutorial shortly so please come back soon.  I know many of you have asked so please bear with me.