* Before you start painting the door of your room, take out the doorknob and all other additional hardware attached to it.
* After this, with the help of a screwdriver remove the door from the hinges.
* Lay newspaper sheets or a painter's cloth on the floor, to prevent the area from getting soiled. Set up a pair of sawhorses and place the door across them.
* Dry the door surface with a clean lint-free rag or leave it unattended for sometime.
* After the door has completely dried, brush on a white acrylic primer on it. Begin with the edges and then prime the entire door surface. Work top to bottom, following the direction of the grain.
* Allow the primer to dry, leaving it overnight.
* Now, begin painting with the edges, starting in the top corner of the door surface. Use up and down brush strokes, in accordance with the direction of the grain. Allow it to dry. Apply a second coat of paint if necessary.
* Flip the door and repeat the same primer and painting process on this surface as well.
* After the paint dries completely on both sides, fix the door and attach the doorknob and other hardware.