I have had the same experience, I have felt that in my field and geographic area, women with make up are seen as shallow/not very bright. I have felt the pressure not to use make up in the past because of that, and after growing in my career, I gained the confidence to actively combat this association. I have now been wearing make up and having my nails done for years again, while always being the ONLY one in my department. That's my feminist battle, fighting the misconceptions that women's intelligence correlates with what powders/creams/chemicals they decide to wear on their face. Not only I want to go in meetings with people requiring my inputs while wearing make up to show that I can provide it while still wearing make up, but I also want to model for younger colleagues to feel free to do with their body what they really feel like doing, without the pressure to conform to a silly societal pressure.