I find the idea of workplaces demanding women wear makeup odd. Mostly because I have a chemistry background, where makeup and many hair products are outright forbidden, for very good safety reasons. After all, when exposed to flame normal hair singes and smells bad. Hair spray causes a scalp-centred fireball that can inflict significant harm. And many body products contain compounds that react unpredictably with organic volatiles and could increase injury if an accidental exposure occurred.
It's a policy that definitely applies to everyone, too despite what some thing. Like the guy who wore contacts instead of glasses and had them bond onto his cornea.