Makeup of that nature on a child seems... unnecessary. There's a conveyance of realized sexuality, and it's affect on others, that comes with most forms of drag. It is disconcerting to see a kid attempt to embody that, and then have adults respond to an energy a child shouldn't know much about. There's a movement to get young girls away from this, but it still makes me worry the positive reinforcement will make children attach some self-worth to expressions of sexuality, which may affect them through puberty and adulthood.
The upside is the 8yo didn't simply go in to get a makeover. He got to see a real work environment and during the session received instruction and applied techniques. He was learning and developing a skill that can be used in the future.