I'm not sure I'm very impressed with the results on the youtube link though brush painting was good enough for Rolls Royce back in the day. One thing is that when painting gloss woodwork you "lay on" paint in one direction, "brush in" at a right angle to the first coat, then "lay off" in the original direction to eliminate brush marks. An alternative way diy of spraying is to use an LPHV (low pressure high volume) spraying system. A friend gets good results on his Panhards working in a domestic garage.