Great job! Good symmetry in the fade, and it appears to have nice, even coloring.
I would ask a couple questions, though.
Did she enjoy doing it?
Does she seem to be a "natural" at it?
Does she seem to have "the eye" for balanced symmetry?
If so, I might suggest you take her to a few old-car/hot rod shows, and let her watch the stripers at work. These guys get doggone good at old-school hand brush pinstriping. If she likes the methods and medium, it just might be a way for her to earn some pretty decent money for a weekend. I've heard of some of the better stripers coming away from a weekend with 10 grand in thier pocket.
To have a person that can do both hand-brush pinstriping, and airbrush artistry in a single package would be a wonderful set of skills that would carry over well to motorcycles and boats, too. (Pro bass fisherman, Pro drag racer's car's and trailers, etc., etc.) As a bonus, the materials and supplys are (relatively) low cost, and take up minimal space, so can be carried in an economical car.
Sorry, I sound like a self-centered talent scout. I suggest if its meant to be, it's meant to be,....... just don't stifle her if she wants to persue it. Roger