[header] How to sponge paint a bathroom [title] Apply painter's tape to the ceiling where it meets the wall, the doorjambs, wood trim and any areas where the walls of the bathroom meet the tile. [step] This will protect these areas from the paint and help make cleanup easier. [title] Pour some of the paint in the base color, or color that will be behind the sponged paint, into a paint tray. 
[title] Dip a paint roller into the paint and roll the base color onto the bathroom walls. [title] Use a paintbrush to apply the paint to the edges of the room.