Ready to paint your front door an eye-catching hue? Before you decide on a color, tape some swatches to the door to observe how the paint looks at different times of day and on cloudy and noncloudy days. When it’s time for the actual painting project, choose a nonhumid, clear day. Lowe’s Home Improvement department suggests removing the door from the hinges first, then cleaning and sanding the door before applying a primer and paint. You’ll need about a quart of paint to do one door. Allow the paint to dry thoroughly before rehanging the door.