Replying to Rails and Deburring

I think i've heard that you are supposed to de-burr your skis after grinding rails somewhere. I just started grinding awhile ago and today when I was doing it i was completely stable and everything and then I came to the end of the rail and suddenly my front edge caught and I ate in on the ice after the rail. Are you supposed to deburr or file down your edges or something? How often do you do it? how do you do it?
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Did you hear about the Chinese couple that had a retarded baby?

They named him Sum Ting Wong.