The guys are looking great!
If this were me I probably would give it a basecoat of the complimentary colors I'll put around it. What I mean is, I think you're at or approaching the stage when I (others may be different) really need to see the eventual contrast of colors to know where I want to go, even on the parts that are pretty well-developed. I often get myself to a point where I feel I'm missing something, only to realize after the fact that what I was missing was context. After I make even a start on the other major areas, I usually have a clearer idea of what the skin (in this case) needs to approach the idea in my head.
That's just what I've found about how things shake out for me. You keep doing what's yielding such nice results. And good luck juggling all the great advice!