When painting stucco, is it better to spray and back-roll, or roll on?
—Ray, San Jose, California
Really it's just a judgment call. You can try to spray and back-roll. If it was a small job, you could just roll on the paint. Rolling on stucco goes very quickly. Use a thick roller that will hold a lot of paint, better enabling the paint to work its way into the uneven texture of the stucco.
See Using a Paint Roller Like a Pro
and How to Roll Paint Onto a Wall
for more tips