The third trial is using a convex mold with a lot more curvature. We did this because we wanted to test how vacuum would pull over a convex mold and see how increased curvature would work (although for the final headlight we ideally do not want too much curvature popping out of the aerobody). I also made the edges more clear (to act as trim lines).
CAD:
Sanding Process:
For this I just sanded the headlight surface with 600 grit paper (this is quite literally the lowest grit possible otherwise you might gouge). The sanding blocks are problematic because the edges gouge the surface so avoid those, use sand paper only.
The paper edges can also gouge so try to hold the sanding paper such that the edges are curved up and only the middle really touches the mold.