I make my employees cover them up at all times when working.
No matter what you think about it, some older people, and many posher people, still look down their noses at people with tattoos. Remeber you are working in their personal space, and you dont want them to have concerns about who is in their house.
Im starting to feel the same way about the kids they employ as police, who now nearly all have tattoos on display!
I suppose you know if they have tattoos they must be 18... Lol.