How to Paint Drywall to Make It Even

Select a drywall primer for the walls. Use a latex primer if you want to quickly, and easily, prepare the walls for painting. Latex primer goes on smoothly and works well under latex, or acrylic, paint. For humid climates, bathrooms or kitchens, use an oil-based, alkyd primers. These primers fight mold and mildew and work under latex and oil-based paint. However, they have a strong odor and take a long time to dry.

Cut in the primer around the tops of the walls using a steady hand and even stroke. You can use a small bristle brush or a foam edger to apply the paint. This will cover the areas that the paint roller can't reach.

Pour the primer in a paint tray and load a roller brush with the primer. Use a quality roller brush with an extendable arm for the higher walls. Choose a roller cover with at least a 3/4 inch nap. These naps are versatile and work well on the rougher texture of drywall. Use a lamb's wool cover to avoid splatter and use more paint at one time.

Roll the primer onto the wall in a zigzag pattern until the drywall is completely covered. Go over the drywall using consistent, overlapping, downward strokes. This gives a smooth, even look to the primer. Allow it to dry before painting. Drying times vary, depending on the type of primer; consult the product's instructions.

Paint the wall with your chosen paint color. Use the same techniques as with the primer, however, you can use a roller cover with a small nap -- 1/8 inch to 1/2 inch. The smaller the nap is the smoother paint will go on. However, oil-based paints need a nap of 1/2 inch because they are thicker than water-based. Allow the paint to dry thoroughly and apply a second coat if desired.