there's plenty of places around by me, i've just never tried it before, i might just start off immitating other people's graffiti. practice a little.
my singer got this done the a little while back...

...fair play, a gibson sg on his back, it's different i'll give him that, so far i'm one of the few people who hasn't called him an idiot for getting it.
i thought about looking into becomming a tatooist once, but i don't have a very steady hand these days.