I'm with Donald on this. Sprayed flat black is the way to go. Everything above the layout just disappears visually, yet is totally accessible. Plus the paint helps seal in dust generators. Do as much as possible overhead first, then mask off the lights and anything else you don't want black, and have at it with a sprayer. Stick with one brand of paint. All flats are not the same! Do the ceiling first. The backdrop is next, then the layout.