Prepare the Masonite door for painting by cleaning with mineral spirits. Apply mineral spirits with a clean rag and rub in a circular motion. Allow to dry until no smell from the mineral spirits is apparent.
Wash the door with a mild detergent. Mix a few drops of dish washing detergent in 2 cups of water and clean the entire door. Rinse well with clear running water.
Let the door stand to dry for at least 2 hours. Do not towel dry.
Paint the door with an oil-based paint. Begin with a darker shade. Completely coat the door and allow it to dry for 24 hours.
Apply a crackle glaze. Use a natural bristle brush and go only in one direction with the brush. Coat the entire door with the glaze and allow to dry for several hours. Apply a second coat and allow to dry.
Use a latex top coat over the crackle glaze in a lighter color than the base. The top layer will begin to crack, giving the door an antique or old appearance.
Apply a base coat to the door. Use an oil-based paint in the desired color. Select a darker color than the intended top coat. Allow to dry. Add a second coat and allow to dry.
Apply the top coat. Use a lighter color oil-based paint. It may not cover the base color. This is normal and part of the process. Allow the top coat to dry.
Rub the door with steel wool. Once the top coat is dry, distress the layer by rubbing steel wool back and forth across the area to form a grain look. The bottom layer will begin to show through and the door will appear antique or old.