first using clone tool, erased the nose of the girl
step 2 of 7
using transform in different layers, worked on the eyes, lips and chin.
step 3 of 7
I got this
step 4 of 7
then is a repetitive process. using adjustmen layer. in levels. choose the different colors you want to use. and this creates a mask. pres ctrl+i to invert and you can start painting. it takes a lot layers.