Most painters have no problem painting doors in place, but they recommend you lay the door on sawhorses and work horizontally. If you have a paneled door, start with the panels and work from the outside edges in toward the center. "Watch the corners — paint loves to puddle," warns Dixon. While the paint is still wet, lightly "tip off" the panel with an almost dry brush. (Tipping off is pulling the brush over the surface to level out the finish.) When painting the stiles (vertical) and rails (horizontal) just follow the grain of the wood. When the grain changes abruptly, for instance, where the rail meets the stile, don't stop your brush stroke — you'll only leave a lump of paint. Apply paint across the joint with a full stroke, and then tip off the overlapping section by pulling the brush in the direction of the grain. "Make sure the door is dry before painting the opposite side or rehanging it," says Maceyunas.