How to color hair?

[Tau Myx]

So here is a trace of Gwenpool that I did in order to familiarize myself with tools and such.  But I ran into a major stumbling block with her hair.  I can't find any way to color in such a shape.  The group labeled "front hair" is the problem.  The only way I could fill it was to vectorize a copy of the lines, and then use the fill tool.  But that left jaggies all over and I had to turn it out of focus.  Plus I'm sure that will cause other problems down the line.

How can I fill "Front hair" without vectorizing?  The "Back hair" layer is something like what I want, but the screwy use of line widths is very slow and problematic.  I want to draw a web comic, so I need to be able to draw figures quickly.

Gwenpool test.afdesign

[firstdefence]

made a curve shape and made it a child of the main front hair, applied a transparency gradient to blend it.

[Tau Myx]

Thank you!

Now how can I eliminate the pixel layer?  What I really want is a vector version of that.  (Notice how the colors bleed out of the tips of her hair at the bottom?  Compare that to the back hair layer.)