Painting the Dart

Looks like a nice ride and well worth the effort to do it right the first time your money ahead if you plan on keeping it but that's just me. I'd strip it down to metal and take it all apart and redo the car the right way but if you can repaint it and keep the rust down a bit than not a bad thing in my thinking. Professor Fate and Demonic are right take care of the rust and look into it a bit more before you decide to just throw paint on it.
It is your car we are all here to just give pointers on our opinion but you have a nice car and hate to see it done wrong.