Doing my apprenticeship quite some time ago now we were certainly rapped over the knuckles if we were seen dragging a file over our work, one little dag, especially if you were getting close to dimensions would scratch the hell out of it & no amount of polishing with a good wet & dry would get it out!
Had the file card handy all the time to keep our files clean.
Same with the hacksaw!
You don't have to ask why