Nice progress real fast! If you're going to 'glass it you might be better off creating a new mold out of styrofoam insulation or something, just to make it smoother. You could make a
fishbone model and sandwich insulation between the "bones". Sculpt the extra until it resembles the shape, fill it and sand to a paintable surface, then glass it.
I'm getting ahead of myself. Anyway, what kind of MPG do you see going 50-55mph?