The bigger issue is with flying in rain. The highly polished, waxed finish will bead up with water droplets. The rougher surface will shed water without forming the really draggy (is that a word?) droplets. Same as if you waxed your windshield in your car, water beads up instead of sheeting off. So if and when you have to blast through that virga line the drop in performance will not be as severe.

Bob