As I mentioned in my last email, I found snap to path, but it didn't work that great. It seemed to fit curve to a curve well some of the time and didn't seem to snap vertices to the path curve.

What would be great is if it could snap a curve to a curve all of the time by inserting vertices as needed to make the snap happen.

I'm also going to play around with grow and shrink, to see if that's a better option for multilayer hair, that just adjusting the paths manually.

There would still be some alignment of paths between objects with higher/lower z-orders needed and it still wouldn't solve the eyebrow problem.

I may end up just doing a boolean operation.