In general with paint, the more you thin it, the more coats you need, but the longer it lasts once you are done. Also don't use water-based primer to cover oil (even though it says on the side of the can that it can do it!), use a shellac primer.
That second one I learned from painting my first condo; painted the ceiling, gave it a week to cure; taped off to do the walls, and after finishing the walls, the ceiling paint came off with the tape! Got a pro in there and he said "if it actually did what it says on the can, I'd use it because it's way easier cleanup"
That second one I learned from painting my first condo; painted the ceiling, gave it a week to cure; taped off to do the walls, and after finishing the walls, the ceiling paint came off with the tape! Got a pro in there and he said "if it actually did what it says on the can, I'd use it because it's way easier cleanup"