Protect all your surfaces in the room you are working in with drop cloths, tarps and sheets of plastic. Use painter's tape or masking tape to secure these coverings tightly to the floor or wall. Choose between ready-mixed drywall mud or a dry form that must be mixed with water. Applicator tools include a drywall trowel, putty knife, paint roller or texture sprayer.
Texture may be applied to interior walls several different ways. The texture may be thinned down with water until it is almost a consistency of pudding. Add to a air pressure sprayer made for plaster and lightly spray onto the surface to create a splatter technique. The thinned-down plaster may also be applied to walls by rolling the material on to the surface.
If you have little drywall experience, practice your technique first on a large piece of cardboard, old drywall piece or wood. Ensure you like the results. Finish the entire sample board from prepping and applying texture to painting with acrylic paint before moving on to the project area. Once the texture is applied to your walls and ceilings, it is difficult to remove. Practice as much as needed to ensure you are pleased with the technique.
Once the plaster is dried for about 24 hours, you are ready to apply paint. Roll the paint over the surface using a roller made just for plastered, rough surfaces. Use a roller with at least a 3/4 inch nap. Apply two to three coats of paint. Keep in mind, 1 gallon of paint covers about 400 square feet. However, with plaster, the paint will cover slightly less.