When should you use a sanding block instead of sandpaper?

Using a sanding block is particularly advantageous for flat surfaces because it helps maintain an even level of pressure across the area being sanded. This ensures a smooth finish and minimizes the risk of creating dips or valleys that can occur when only using sandpaper by hand. A sanding block provides a stable base that keeps the sandpaper straight and allows for more consistent sanding, which is essential when preparing a flat surface for painting or finishing.

When dealing with flat surfaces, such as walls, tables, or cabinets, utilizing a sanding block can make the sanding process more efficient and effective, ultimately leading to a better final appearance after painting or finishing. In contrast, other options like rough surfaces, corners and edges, or intricate designs often benefit from using sandpaper directly or specialized sanding tools, as they may require more maneuverability or flexibility that a sanding block does not provide.