Quick primer / paint question

[NDT]

Just starting my restoration.
I've got a lot of panels to replace and repair.

I won't be doing the paint myself and it could be a while before the paint gets done (happily the car's in a garage though!).

Any advice on what to paint onto to repaired areas to stop rust getting hold?
I may or not may not get the car stripped before painting - to some extent that's down to whoever paints the car.