Here's a build sequence I posted on another web site when I built one for my 3w......
Out to the shop this morning to attack the passenger side wheel well.
This will be the third time I've patched this side. I think I finally have the door fit and fender fit correct that the quarter panel must be in the right spot.
Old patch laid on sandbag to make a pattern for a new piece.
Butcher paper held on with mini magnets
A dirty finger traces the outside shape.
Pattern cut out and stuck to old patch again.
Trace area of higest crown and the tip line that becomes the flat mounting flange.
Trace onto 18 ga.
Rough cut with foot shear.
Final cut with electric shear.
ATF for lube.
Planishing hammer to raise crown.
Tipping die in bead roller and English wheel to smooth out planishing marks.
Final planishing with T-Dolly and hammer
Punched holes for plug welds