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The lines are all lowered in opacity so I can see what I'm doing when I color. I'll more than likely delete the scan lines as I build up detail. There's an overall dusky-pink tint that came about when I was turning on and off different experimental color layers. I decided to keep the tint and start laying color over, much like painting in oil on a canvas tinted with a wash. On the hair I keep referring to the original sketch scan so that I maintain my values (painterly term for contrast).