Brushes with 3-inch to 4-inch bristles are your workhorses for painting large, flat surfaces, such as walls, ceilings, floors, fences, or doors.

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Use a 2-inch to 2.5-inch brush for painting trim, baseboards, and details, or for cutting-in around corners and edges. But where this brush differs from the rest is in its handle, which is a flexible, soft-grip material that bends as much or as little as you'd like, making it easy to adjust the angle of the brush to the surface you are painting. Not only that, but the handle is also threaded, so you can attach any standard extension pole for painting way up high.

Now, rinse the paint brush bristles thoroughly under running warm water. Hold the brush with the bristles facing down to prevent water from running underneath the ferrule. Nylon/polyester blends are the most popular choice for the average DIYer, and these are the brushes often labeled as all-purpose. They combine the smoothness of nylon with the slight stiffness of polyester for a sturdy brush that lays down a smooth, even finish. These blended brushes are ideal for water-based paints, but most can also be used with oil-based products. Polyester bristles are somewhat stiff, and they're best suited to painting exterior walls and other outdoor surfaces. These brushes are best with latex paint, but they can be used with oil-based paints, stains, lacquers, and shellacs, as well.

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Angled brushes, often called "sash brushes" and sometimes called "cutting brushes," have bristles that are gently angled across their edge. This is the brush you want for painting trim, cutting-in along edges and corners, touching up detail work, painting grooves and other oddly shaped surfaces, or painting in a tight spot, such as between closely spaced windows. Many painters today are reaching for paints with low or no VOCs (volatile organic compounds). While low-VOC paints are friendlier to the environment and produce far less smelly fumes than older types of paints, they also dry much faster, which can leave streaked or blotchy results, especially if you are new to DIY painting. However, the Wooster Chinex FTP brushes are specifically designed to handle paints with low or no VOCs, thanks to the very stiff bristles with full, soft tips. This decreases "drag" on the brush, leaving a clean, even line of paint.Brushes that are 1 inch to 1.5 inches are useful for very detailed work, small touch-ups, or very tight spots. Flat brushes, often called "wall brushes," have a flat, even edge. Use a flat brush for painting any large, flat surface, such as a wall, door, stretch of fence, or large flat piece of furniture.