In this step, we'll add a highlighted area to the face.
Load your face selection. Switch your color swapper to white. Pick the brush tool, and reduce the master diameter to 40. Bring the opacity all the way back up to 100%. In the Mode option, select Soft Light. Now, color in some lighter areas on the face. The same technique can be used to add highlights to other areas; feel free to play around with different modes and opacities - different materials look different under light.