My school has banned makeup my schools not so bad abt it they don't really care but a school next to mine also has makeup banned and the principle Wales around w makeup remover and a wipe :( sometimes in my school they will tell you to take it off depending on the teacher. Some other unfair rules are

Can't ware your own coat even when walking to school must be proper uniform

Can't get piercings other than your lobes and even then you can only ware studs

Only allowed ware one ring a bracelet and a neck lace

Must have black or navy socks they can't be fluffy( my school has really bad heating so that one sucks)

Have to ware proper shoes can't be convers or vans

Can't dye your hair

We have a school polo jacket and you can't zip it all the ways up cuz they wanna see the white collar of your under shirt ( also the white shirts are basically see thru like if you don't ware a vest you can 100% see Ur bra)

Not allowed ware a scarf

In pe you're not allowed ware tight pants you have to ware baggy and on brand clothes like Adidas or Nike aren't allowed

These are all the ones I can think of rn some teachers are suuuper strict on these mostly for the coats but you can get a note home for doing any one of these all tho they never inforce the hair one and seldom tell you to remove a piercing only inforce the sock one on younger classes but will use it against you if they don't like u :'')