Taking a second look at it, I can see how the subject's right cheek is darker than the left, but the skin tone otherwise seems to be consistent across the rest of the face. Finding a face at the right angle is much harder than I imagined, even when your only search criteria is 'man face straight forward.' I only now realize how seldom I have run across a quality image of a person facing straight ahead (with their head visible). The most challenging part of the blending process was actually when I decided to use the Burn tool as I had in previous projects. Apparently, it can reduce transparency and also bleach, which is not what it had done in the past for me. When I switched around between the Eraser, Burn, and Rubber Stamp tools, I began causing problems for myself in the area of transparency; some of the top layer was semitransparent but read as 100% opaque, so my Rubber Stamp would often remove opacity on areas where I was trying to reduce transparency. I didn't quit until it fit.