Ensure that you do the following things before painting interior doors:
You remove all the door hardware, like doorknobs.
Cover the hinges with painter’s tape.
Paint in a well-ventilated area.
Before the paint job, clean with a degreasing cleaner.
Fill the holes and repair imperfections.
Lightly sand with 120-grit sandpaper to remove the previous paint job.
Clean and dust the area.
Put down a rag to catch the drips.
A brush may be more effective for panel doors.
Most doors are heavy and difficult to remove and carry. The easiest way to paint a door is while it is this still attached. Follow the below method when painting a panel door:
Start by painting the inside of the top panels. Coat the recessed areas first and then move to the faces.
Paint the vertical stiles and then the center stiles. Finally, blend in the brush strokes.
Continue with painting the rails, starting with the top rail and working towards the bottom.
Paint the edge at the last while making sure you do not get any runs when painting the face of the door.
Once the paint is dry, do another coat for a uniform appearance.
