Hair Colouring Tutorial -Paint tool sai

I've been asked to do this since the end of time. Been hesitant to do so since I don't typically have one way of doing it and there's no easy way to explain what I do each time. This is more of a cell-shaded with gradient look. This is a bit old and different than what I do now but I'm sure it will help someone.
This is using paint tool sai but I'm sure you can do the same in many other programs (not ms.paint or paint or artweaver though)
Also if you can't read my nasty writing let me know so I can transcribe. I hate dealing with the text tool.