Use a paint sprayer to get the job done in a few easy strokes. Spraying paint provides a high quality finish and saves a great deal of time. You might want try the Wagner Paint Crew, a piston pump sprayer with the performance of a contractor sprayer that is designed for the homeowner. The Paint Crew uses standard reversible spray tips and comes complete with a 25-foot hose, tip and metal spray gun, making the job fast and easy.
Practice on a piece of scrap wood or cardboard before you spray to test your spray pattern. Start painting from top to bottom in back and forth or up and down motions that are slightly overlapping.
Keep your arm moving at a constant speed and keep the sprayer at a constant distance from the surface -- between 10 and 14 inches is recommended. Be sure to stop the flow of paint at the end of each stroke before moving to the next stroke -- this will help you avoid an uneven finish.
If you are going to be painting a surface with detail, spray the base (or dominant) coat and paint the details with a brush.
Allow proper time to dry and enjoy a home that is protected from winter's harsh elements.