― It wasn't until I was in makeup school that I found the need for a setting spray. Sure, I've read about it but I wasn't all that interested because it sounded like a gimmick. I'd like to think that I'm more of a "to see is to believe" type of person. ∙ We were required to use this in class because it (was explained to us) this works like hairspray. It keeps makeup in place for hours on end. We used this before applying primer and as a final touch. If your makeup looks cakey, this helps in [...].