Hey Rubber, good start but like Patty Boy Kirk says, need to blend in your highlights and shadows. In my thoughts it will be harder with acrylics but you can do it with a little work and practice. I used to switch (just paint) from acrylics to oils and back all the time before I got more...
John, from talking to Christian at an MFCA a couple years ago, he explained it to me, he really uses a lot of layers of his clear acrylic stuff from what I recall, from what I remember it was a long and laborious untertaking