Hi Jon,
You did an excellent job in removing the boy’s ache. You have received some very good advice from all the others and perhaps my procedure will also help you.
Below is how I repaired his blotchy skin.
1. Auto Levels
2. Selective Color adjustment-Reds: 0,-43,0,0: Yellows: 0, +9, -100, 0
I added a 50% gray layer above all layers in overlay mode and filled it with a skin texture. Then I added selective sharpening.
Sharon