Move all furniture away from the wall about 3 to 4 feet. Take down all accessories from the wall and cover all remaining items in the room with painter's plastic. Place plastic paint tarps on the floor to protect the ground.
Wipe the wall clean of any grease or debris. The plaster will not bond to the wall if there is dirt on the wall's surface. Clean the wall with a damp sponge and warm water to ensure the wall is clean.
Open a gallon of light-weight joint compound. Whip up the joint compound using a hand drill and mixer attachment. Mix until the plaster is a smooth, wet consistency. If the plaster is dry and crumbles, add small amounts of water while mixing.
Don latex or nitrile gloves to protect your skin while plastering. Hold a drywall trowel in your hand. Dip a putty knife into the plaster and wipe onto the drywall trowel. Hold the trowel with one side firmly against the hard surface. Turn the trowel to an angle. Wipe the plaster onto the wall. Move the trowel in different directions to create texture. Cover about 85 percent of the wall surface and keep some spaces unplastered.
Continue the same method across the entire wall. Clean your drywall trowel and putty knife with water to remove dried plaster. The plaster will build up on your tools while texturizing the wall. Simply rinse in a bucket of water and use a terry towel to clean. Allow the plaster to dry 24 hours.
Put a mask over your mouth to prevent breathing in plaster dust. Sand the entire surface with a fine grit sanding block. Wipe the surface with a wet rag to remove all plaster dust.
Pour latex paint into a paint tray. Roll on the paint to the plaster surface using a rough nap roller. Do not apply heavy pressure when painting the wall. Apply the paint using even, vertical strokes. Paint the perimeter of the wall with an angled trim brush. Dab a chip brush into the paint and then onto the wall to paint any difficult crevices and nooks the roller won't cover.