What is block sanding?

• A. Using a sanding block to create a flat, even surface
• B. Sanding without a block
• C. Polishing the surface with compound
• D. Using a power sander to remove paint quickly

Answer: (A)

Block sanding uses a sanding block to keep the surface flat and evenly abraded. The rigid block distributes pressure across the sanding area, preventing dips, gouges, or rounded edges that can occur when you sand with your hands or fingers alone. This helps you produce a uniform, straight, and smooth surface that’s ready for primer and paint. Sanding without a block often leads to unevenness because pressure varies with the shape of your hand and fingers. Polishing with compound is a finishing step that comes after sanding to smooth and shine, not the actual material removal to create flatness. Using a power sander to remove paint quickly can be fast but sacrifices control and can create gouges or swirl marks, making it harder to achieve a true flat, even surface. So block sanding is the best method for achieving a flat, even surface.