No i think callipers were not replaced... I was not there because it took them the whole day(!) to make this job... these guys here are EXTREMELY slow!!!
When i removed the pads i noticed that the piston was moving by hand if i applied much pressure.. I think its a matter of rust and only.. and if this rust gets much (because pads are soft as people here mentioned) it works like a sandpaper on this soft pads and continues like this... but if in some way (use or manual polishing(!!!)) discs are kept clear this problem doesn't appear...
As for my finger... i must pay more attention where i put it!!! ha ha
