Types of paint that are good for interior doors have a satin or gloss finish, which helps give doors more visual contrast next to walls. Also, doors are frequently touched and moved, so they should be painted with a more durable, high-quality paint.
Before painting a door, remove it from its hinges and place it on a sawhorse. This makes it easier to work on the edges. Next, sand away protruding wood and flaking paint and apply a coat of primer. The primer helps the paint adhere to the surface, prevents the need for more coats and produces a smoother finish.