I agree with the use of rollers, best way imo.
I bought mine recently and they were rolled to fit the body line, except right at the front where the bottom of the wing is as that goes up even further which is why there is a "fillet" on the original plastic trim.
mine are rolled slightly and the angle changes about 1/2 way along the front door. If I had made them myself, I would have added a weld / fillet piece at the front section to "fill" the gap, still could I suppose but it would ruin the nice paint job at the mo :D
https://www.aulro.com/afvb/images/im...09/05/1096.jpg
https://www.aulro.com/afvb/images/im...09/05/1097.jpg