For paneled doors, remove all hardware or cover it with masking tape. (If some paint inadvertently gets on metal parts, wipe it up immediately with a soft cloth.) Paint the panels, working from top to bottom. For each panel, paint the molding first followed by the interior. Finally, paint the rest of the doorl finishing with the outer edges. If the door swings out, paint the hinged edge; if the door swings in, paint the lockside edge.
When applying wallpaper, choose an inconspicuous spot for your starting point. The edge of a door frame is a good choice. This is where the first and last strips of wallcovering in the room will meet, and inevitably, those strips won’t match perfectly. That’s why it’s important to find an inconspicuous spot.