This video shows a time lapse of how you can quickly stain a deck using a car wash brush. This method allows you to apply 2 coats as you go. Start by staining a few boards, end to end. When you get to the end, apply a second coat over the same boards. Be sure not to stop half way in the middle of a board as this will show lap marks when dry. The brush used in the video is just big enough to fit inside a 5 gallon bucket, allowing you to move quickly without refilling a paint tray.