Twenty dollars and an hour of work result in a pretty nice painting tool. Boards equipped with removable pegs for painting individual models.
3 - 1" diameter 4' long dowel rod
1 - 2" x 6" x 10' board (inexpensive $6)
1. Cut the dowel rod down to 6" lengths.
2. Drill 1" holes for desired spacing between rods. I recommend staggering them to take advantage of width of the boards.
3. The two in the pictures are going to be used for priming but I will be making a larger one with smaller spacing tomorrow.