People need to remember no matter how popular tattoos get that it doesn't mean that your employer will overlook your decision to decorate yourself, and I don't think they should have to. You are asking to represent them how you look reflects upon them, and that is something they have to deal with.
I don't mean to cast tattoos in a negative light. I have my hands, neck, and even my head tattooed. I don't regret it at all, and would do it all again. However I know that no matter what I do from here on out I will never be a kindergarden teacher.