Yay for progress. I recently figured out that I have a washing machine cabinet that I could scavenge materials from. Once I'm buttoned out for the rainy season, I can make progress on a steel airdam/diverter w/ air curtains.
Why ribs up? Wouldn't it be easier to attach to the frame with the smooth side up? The ribs won't make much difference aerodynamically, and if you roll it over, everyone will go "Oooooh, diamond-plate!"
If the sections are easily removable, when it gets beat up you can drop a piece and hammer and shrink it flat again.
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