Hi, I was just hired by Sephora a few days ago and worried about that too being that I have a full sleave along with other tattoos. I have the employee hire pack and this is what it says:
Tattoos
Tattoos are permitted without foul language, nudity, or sexual connotations pictured on the tattoo.
Piercings
Single piercings in the nose,eye, lip and tongue are permitted and can be worn singularly or simultaneously as long as not to interfere with the client experience.
I considered working for MAC too but reading what you have to go through to get hired completely turned me off. Apparently there's 3 parts to the interview including you bringing in a model to demonstrate 2 looks while other people watch and it can take months for them to hire you. Everyones saying the best way to get hired there is to become friends with a manager so they can put in a good word for you...mainly goes by who you know. And they also said if any of the associates tell you you should work there it's all a part of their job and if you actually get hired they stop talking to you. But if a manager says you should work there definitely take it serious. Sephora seemed A LOT friendlier plus you get TONS and I mean TONS of free stuff(gratis) and they pay for you to travel. I have a friend who's worked at Sephora for a few years now and she gets paid $20/hr and she's full time. Sephora is very generous. Haven't heard too many good things about working for MAC except for the name and being able to say you work at MAC. I really didn't believe it until I applied at MAC and they were INSANELY rude...I asked to speak to a manager and she actually came up to me and said "What do you want?," with major attitude and then acted as if she had no time for me. I live in NYC so maybe its the area but I've read reviews about working there from all over and they all sound the same. But don't let me discourage you, just my experience and opinion.
Good Luck!!!