If you know women in the home-brew makeup/perfume/beauty community, it seems like they're already well served without needing a printer. The same people who would know enough to buy a printer also know enough to buy pigment from a craft shop. The market that isn't that clued in reads Seventeen or Elle and overpays for Revlon at Walgreens because they're low-information consumers. The low-information consumers are already buying Revlon because they don't know any better and don't want to know any better.
I think what'd be more interesting is a machine that serves the small manufacturers better, which can make small batch runs more profitable and reduce reliance on larger manufacturers.