agree with paul, you'll be amazed these days just how many of your customers have them hidden away. a lot more than you think, stop being so old fashioned, loads of people have them. i had a guy in a suit come to my house trying to sell me something, i was topless fixing the van and he commented on my tats in a nice way, then rolled up his trouser leg to reveal a massive tribal, turned out he had loads, well in his fifties and a right posh en.
i personally think you could miss out on the best candidate if your putting tattoos into the equasion of who doesn't qualify,
ps... ive had 2 helpers, both covered in them and not only were and are they great workers, but the customers get on great with them, its not the tatts its the personality that counts.
thats my 2 penneth.
hope this helps