[Rick Parker]

If you check with a Body Shop Supply company there are structural adhesives available that remain semi pliable and can be sanded, primed & painted. "Lord" is one company and I am sure 3M is another. The applicators mix the two part epoxies as they are dispensed from a tool similar to a caulking gun. I have used Lord's product (several available depending on parent materials) more than once to bond aluminum to fiberglass. Aluminum l has to have a self etching epoxy primer applied before the adhesives will bite. They are used by GM in OEM manufacture of the Corvette for attaching body panels and substructure components to each other, this is real strong stuff. I believe you would have better luck with something like this than "Bondo". The thin aluminum on the hood will "move around" alot due to thermal changes and flex of the thin metal. The original cars scoops, seams etc. were gas welded and metal finished.