My Traveller was bought cheap as it had fibreglass wings.
4 years on they are still fine! Had a white van hit the rear right corner almost as soon as I got the car, the wing flexed and went back to shape. Rear bumper pulled out with a swift tug and the only real damage was a broken tail light lense! AA picked his van up if I remember
Fibreglass may not be original, but is flexible (to a point) and if made by a reputable source, then doesn't flap around in the wind....
And it doesn't rust!! The rust/drainage holes argument could easily be levelled at steel wings made from recycled Focus's if wrongly applied.
Not too sure about comparative structural loading/weight figures, still waiting for a reply from Lotus on that one
