- 1). Use sanding sponges instead of a traditional sanding block and sandpaper to sand the wall. Sanding sponges work much like traditional sponges, holding water in the absorbent center that comes out as you sand, keeping the surface of the sanding sponge wet at all times.
- 2). Cover the floor beneath the wall with plastic sheeting. Tape the sheeting along the bottom of the wall to catch drips.
- 3). Fill a bucket with warm water so that the water isn't too cold for comfort. Dip the medium-grit sanding sponge into the water and wring out enough water so the sponge doesn't drip.
- 4). Start at the top of the wall, using a light, circular motion to sand out any imperfections in the wall or spots on the wall that stand out higher than the rest of the wall's surface. Dip the sanding sponge into the water again when the surface of the sponge gets sticky with sanding dust or when the sponge begins to run dry. Continue sanding with the medium-grit sanding sponge until all the wall's imperfections have been removed.
- 5). Go over the surface of the wall again with a fine-grit sanding sponge. Begin at the top, sanding in a circular motion until you have sanded the entire wall to a smooth, even finish.
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