I used the cheap flat black spray paint from ACE Hdwe and had no problems, just a little touch up here an there.
As for painting, I cut all the pipe (white pvc)to length. Then I lay it side by side on a flat surface. I then spray the side that is up, let it set for a bit, roll it about a third way over and spray that. Keep turning until you are back to the starting side. I found this was easier and wasted a lot less paint then spraying one pipe at a time. A brush would work just as well with this method.
As for painting, I cut all the pipe (white pvc)to length. Then I lay it side by side on a flat surface. I then spray the side that is up, let it set for a bit, roll it about a third way over and spray that. Keep turning until you are back to the starting side. I found this was easier and wasted a lot less paint then spraying one pipe at a time. A brush would work just as well with this method.