waveydavey
No they can't. For some reason the ink smudges. Today 15:54
Well i guess it depends where . If nobody can see it when you wear the uniform i think it may be ok but I think it will be a problem if you have some on your face or neck or arm
http://www.coolopticalillusions.com/...eck-tattoo.jpg 
simply don't that to yourself , it's the best way to be sure
regards