This is a horseshoe technique where you start on one side and work around to the back occipital bone, then start on the other side and go to the back again.The top then can be foiled with straight foils going from front to back.
Here’s Shannon Keels technique for hand painting. Her Herringbone technique start in the back, with a diagonal section and then the next section is on the opposite on a diagonal and she works back & forth until it’s finished.
Using 3 different tonalities to make this curve of color.Use slices of 3 like tones- copper, red-copper and golden copper!
If your client wears a side part just move the Chevron over and work off of that side part line.