[K Dubious]

IMO it would be way easier to hand paint. When using spray paint it is hard to get an even coat on all the nooks and cranies and you'd be surprised how quickly the paint goes down when using a brush. I typically just drop paint directly on the piece and move it around until I need more paint.

My two cents on the handrails are they are really difficult to pull off a clean look and symetry is key but it could be done.

Are you using the foam baord with the paper removed or is the paper still there?

Reguardless of what you decide, it looks great man.