If thats all you have or can get, but it will dent very easily if you dont anodize it before painting, 5052 is a better choice as its a little stiffer or 6061 t4, 3003 is a shapeing material that I would use to form a raised dragster cowl for which I would have to aneal in order to get the form I desire with minimal effort.
040 is a little thin for anything but a basic cowl shape. On a previous R/E build with a basic body shape I used the same aluminum that goes on trailers for sides already painted. Comes with a plastic coating on the surface, will take a step/edge roll or Dzus dimple without cracking, normal bending with radious dies in brake. I found the material cheaper than plain alu, and saved the cost and weight of having it painted, comes in all sorts of colors.
