If your door is in good shape with no cracking or peeling paint you may be able to paint over the door with very little preparation.
White oil paint for doors.
If you re painting your door white and have white trim around it i recommend using the same paint color and finish as the trim.
When painting edges some paint inevitably slops onto the faces of the door.
If this is the case you must know the base of the last layer of paint applied to the door.
For a door made of pine white fir or another wood species that doesn t bleed i e gives off tinted compounds in wood called tannins go with a water based exterior paint such as behr.
Brush on a light coat.
Behr premium plus interior exterior hi gloss enamel is 100 acrylic provides a mildew resistant finish and is great for high use surfaces.
It s better to have that happen before the faces are painted.
Choose an interior door paint color.
Paint all four edges of the door first.
A heavy coat of paint covers better and sometimes levels out better but runs are more likely and brush marks are deeper.
Valspar ultra white oil based door and trim paint 1 quart item 760532.
You can however paint water based over oil based paint.
For pricing and availability.
This tough stain resistant sheen withstands moisture and wear.
Some of my favorite whites for trimwork and doors are benjamin moore s cloud white and dove white in either semi gloss or satin.