Here is a model glider wing that one side has been covered with the Bucks-Composites materials system and the other side has not been covered with the Bucks-Composites materials system. If you want to look after your model then I recommend covering the wing and fuselage with a permanent covering such as Bucks-Composites materials covering system. This will also withstand a few nocks and still quite light. Another advantage in covering with Bucks-Composites materials system is that a repair to the wing or fuselage can be easily achieved.