When it comes to painting walls, the type of brush you use can make a big difference in the quality of the finished product. Natural and foam brushes can be used, but synthetic brushes are generally better for painting walls. They carry enough paint, leave a smooth finish without leaving loose fibers, and can be washed and reused many times. Nylon bristles are recommended for water-based paint, although most can also be used with oil-based paints.
Larger sizes, typically found in 3-, 4- and 6-inch sizes, will be more beneficial if you plan to paint larger sections of the wall.
The Wooster Silver Tip brushis one of the best you'll find for this task and is a favorite of professionals and DIYers alike. This 3-inch brush is the perfect size for painting walls, as it's big enough to handle large, flat surfaces quickly and easily, but not big enough to make it difficult to control. The Premier Montauk brush is made of Dupont Tynex and Orel filaments, which bring more paint to the tip of the brush and leave a smoother finish.
Nylon is much more durable than bristles, so choose a synthetic brush to paint rough surfaces, even when using oil-based paints. Developed by the Dupont company, Chinex is a modified nylon bristle that mimics the qualities of natural bristle brushes. This set includes a 100 mm (3 inch) flat brush that is perfect for applying paint to the wall, as well as other smaller brushes for additional work. If you want to create a smoother and more precise finish, choose a synthetic bristle brush that is dense and has trimmed bristles.
But what differentiates this brush from the rest is its handle, which is a flexible, soft-grip material that bends as much or as little as you want, making it easy to adjust the angle of the brush to the surface you're painting. Foam brushes do not have bristles, but rather a solid piece of soft foam with a slightly chiseled edge. Taking good care of your brushes is just as important as buying the best brushes for your projects. If it will be several hours before you return to the project, you can prevent the brush from hardening by wrapping the entire brush head, including all the bristles, in plastic wrap.
While rollers have their uses to cover larger areas in a short time, a brush will give you a better, smoother finish.