Adding additional texture adds roughness and grit to the walls or ceilings. If the texture is a popcorn finish added over an existing popcorn ceiling, additional texture is a way to refresh a finish without removing the plaster. Applying the texture in segments may give the look of aged and antiqued walls, with some areas appearing to have peeled, leaving the underlying stone exposed.
In nearly all situations, the surface must be repainted once the new layer of texture is applied. Latex paint and a roller created for textured surfaces is used. Avoid applying paint with heavy gloss. The walls will appear shiny and reflective, and you may loose the effect of the texture. An exception to the paint rule is when the plaster is tinted and applied over an existing faux finish with coordinating color.
Before the second layer of texture may be added, the surface must be clean. All dirt, grime and cobwebs must be cleaned from the corners and edges of the texture. Wipe the surface with a rag dipped in clean water. Do not use soap as you may leave soap residue on the wall that can affect plaster adhesion.
When the second layer of texture is applied, it will be difficult to remove. Ensure you are looking for a very textured surface for your walls or ceilings. Joint compound is one of the most inexpensive plasters commonly used to add texture to your home. Add a bottle of glue or a tube of latex caulking, and mix with the joint compound. Joint compound is a soft plaster that chips easily. With the added items, the plaster will be more durable. Durability of plaster and texture finishes is important when texturing high-traffic areas.