One other thing I was thinking about with Rhino Lining and Line-X: they have no-skid surfaces, which to me means, basically, that they have a rough surface, making for potentially more wind resistance than the bare cladding (and potentially using more fuel)
Since the cladding already has a slightly rough surface, I dont know how much MORE wind resistance (and fuel usage) it would add. Anyone have any experience with that, or can make an educated guess?