In all seriousness.... You'll need to plates made up to the shape you require..

have them tacked in place, when happy, weld them in stitches so you dont warp the bonnet/plates...

apply filler and just keep smoothing it back untill happy with finish


give it a coat of primer to see if there's any imperfections, If there is, rub back and apply more filler ( You'll only want small skimmings too.. )


then just work on from that