I read that, but I also read some horror stories of tape coming loose or tearing. I don't think I am in an environment that would require tape, but I am wondering if the wear on mine is normal and all that is needed is some sanding and polishing. I tried some emery cloth and it smoothed out the edges then I tried a polishing stone on some of it. I've never seen aluminum flake or peal in layers like this. Is the leading edge made up of laminated layers of aluminum? Roger did say the trailing edge is more important than the leading edge. He said to make sure the trailing edge is waxed and they have found a gain of over 2 inches less manifold pressure to hover.