I want to tell my girlfriend to change her makeup style.
Why do you want to change her makeup style?
I think she wears too much of it.
I think that perhaps you should keep that comment to yourself. It is wrong to control the amount of make up she is wearing. She probably likes how she looks.
Okay, but I'm still going to talk to her and get her to change it.
I really don't think you should tell her that you don't like her makeup. Doing so would just make you seem controlling and rude.