Thank you all for your responses.
I usually have my haircut in a some kind of old style barber shop but after taking a look around the place couldn´t see any straight razor (just disposable ones) nor any hone or anything like that. I´ll try and ask the barbers, maybe some years ago they used to use them and they know about honing...
I´ll take a look at those links too and consider the european forum members as I get to know you.