If I had to pick a side to debate, I would choose brushing and rolling paint. Most painters say, unless there is a lot of surface to paint, considering the masking and cleanup time, they are faster with a brush and roller. With spray, the paint goes everywhere. Outside spray paint will seem to find the nearest expensive car of the opposite color of the paint, causing a pricy car repaint. If you rent an airless sprayer, it will probably break down before you finish the job. The cleanup is very time consuming. Folks ask my opinion on power rollers. My feeling is that I only want my arms in the air for so long. It feels good to change positions long enought to get more paint on the roller, so I'll stick to the old fashion way.