I take a file to my brand new skis every season...file the livin' shit right out of them under neath my foot...cause new skis on rails blow camel penii (yes, that's plural). Rails don't damage skis that bad, especially if you stay away from the fun stuff on rails, like switch up's, diastering the last segment of the roller coaster rail, 450's on and just general diasters. That's what hurt skis and blow edges. Also I've learned, don't let Thor bend you ski, he'll make a powder ski look like a noodle and almost make you cry as he bends your new twigs like a string of spagetthinni.
Skiing without rails is really like old school