Sand the wall to remove any gloss and to make the surface smooth. Rub the sandpaper back and forth across the wood and check for shiny areas by looking at the wall from several angles. Glossy finishes should be removed to ensure proper adhesion of the new paint finish. Sanding also removes minor surface scratches and stains that can show through final coat.
Use the wood putty to fill in deep scratches or holes left from wall hangings. Wait for the putty to dry then sand it down to make it smooth and even with the rest of the wall. Paint spreads more evenly over a smooth surface so it is important to make sure you repair any damaged areas. Use a tack cloth to wipe away any sanding dust that could get in your new paint.
Prime the wood to seal it from moisture. Primer also covers old paint so that the surface is even, making it easier to apply your new paint finish. Let the primer dry before painting. Refer to the manufacturer’s instructions on drying times.
Use the paint roller to apply the paint to the wall. Rollers help you cover large areas quickly, while brushes make it easier to get into small corners of the wall. Roll the paint on the wall in an up and down motion, similar to a "W" shape. Wait for the paint to dry. If necessary, add one more coat to cover any bare or translucent-looking areas.