How do you attach the metal skin to your speedster wood body frame.
there are special ring nails available that work good. Otherwise screw work OK too. Ford used nails to build the T.
will these ring nails hold in plywood?
Hold in the edge or side of plywood I meant to ask.
Not good in the ends of plywood. Screws are also not good in the end grain of plywood.
As in bucket seats, make the seat frame as if were quality furniture, with short pieces of wood sort of like the old model airplane tail sections, wing tips, and fuselage formers were constructed. So do not use plywood or the screws will work out as the body flexes, and it will flex.
You could use the old "Dutchman" fillets to allow for screw attachments, but that is more work than building it correctly.