WOW! I want the two of you to go and grab a quart of epoxy and hardener, then go grab about 4 rattle cans of paint & throw it on a scale. I bet you'd be suprised to see it weighs less than 5 LBS, but, now you have to remove the weight of the cans for the paint, the thinner used in the paint(about 50%) and the weight of the plastic jugs holding the epoxy, now remove anywhere between 25-50% of the epoxys weight for sanding(yes, you sand away about 1/2 the resin when doing a proper glass finish) and you might be left with about 1 LB or 1.5LB of total weight on a large aircraft with over 1000 sq inches of surface area. Yes lighter flies better and no, plastic will puncture and tear, especially todays plastic coverings that are a joke. You never have to reshrink epoxyglass or worry about punctures, TWN, if you could remove the glass from the surface, it wasn't applied correctly, the wood should have absorbed the resin as well and kept the glass firmly attached to the wood to the point that removing the wood from the glass would have ment destroying the wood to remove it. And now hat brings me to a composite structure, once you impregnate the wood and glass together with a binder of epoxy, you now have a unitized structure that is locked together and gives you a solid hard coating of glass. If you actually puncture the surface, it will be minimal damage, plastic covered wings wil either be destroyed or require complete recovering and major rebuilding with the same type of impact.