That face is excellent! This represents a completely unique and very interesting approach to painting the face. Bravo to you for thinking outside the box!
I have stuck with oils for a number of reasons. Laziness being chief among them Deep down, though I always felt you could not get really good skin tones on large scale figures with acryl. Wow, was I WRONG. GREAT face on a wonderful figure.
oh man, the flesh tones are about as good as it gets with acrylics, well, in general. you have a very well-painted bust there dude. The eyes look right back at you. beautiful work.