Believe it or not, as a junior I had the hardest time believing this. We'd be down in the waxroom filing our edges to death every other day and it would feel like I couldn't get an edge otherwise. The idea that the edge could be "polished" back to sharpness was alien to me. That being said, on skinny skis in the 90s, it took a lot of work to set an edge and little kids were at a disadvantage. I was basically skidding around and the sharp edges were just keeping it at bay.