I have thought about priming prior to flipping and wondered if anyone had any thoughts on that. I don't want to apply the topcoat until all the other work is done and I was wondering if there's some kind of time-critical component to the primer/topcoat application. It might be 6 months between the two steps. I know that in the car painting world, you generally want to prime (bare metal) and then paint prior to the primer curing.
Priming prior to flipping is pretty common, ultimately the answer is better suited to the paint manufacturer - their answer might be to scuff the primer when you are ready for top coat, or it may be to apply a fresh coat...