Priming new wings...

Hi

Just wonderred if i can use about 4 big cans for this?
how thick or thin would i need it and shall i prime and paint
the inside of the new wings or just underseal then or what?

definately prime and paint the inside, not sure on how many spray cans you'd need though, enough for approx. 4 coats of primer should give you enough to sand back, anti-rust primer is a good idea for the inside to.