Concentration Piece No.1 Updated

As I paint, the concept of my piece has changed a bit, where I added another head on top of the right one, which originally was just going to be one head. I find I have some trouble with the paints and smoothing them out to be blended. It kind of keeps peeling. I am also unsure of the color choices that I made, I plan to put purple on the left head, but I am now unsure of this choice. I suppose I will do it and if it doesn't work I can always paint over with another color.