I tried to take a few more shots of the second pic, I hope it sheds a little more light onto my process! I feel like the step between base colours and final is so big sometimes! I basically reduce the opacity of the sketch and draw over the lines I want to keep, before getting rid of the sketch. I generally work from light to dark, outline wise, to make sure I don't go overboard with the darkest lines! (you can see I used dark grey in Rosemary's hair very sparingly, and darker lines on the faces and clothes in the same way)