In Las Vegas during the 1990s, I had non-AA students do my hair. I'm a very engaged client, so I was watching them like a hawk. And my relaxers turned out well.
Right now, my biological sister does my hair except when I am up here in "the O.C."

When that happens, I go to Long Beach to a beauty school where nearly all the students are of color. I've had Chicanas do my hair, and they've done a good job.
And as an aside, right now much of my sister's clientele is non-AA. Now, she's starting to get more because of soror referrals.