What is the primary use of a portable electric sander?

A portable electric sander is primarily used for smoothing surfaces. This tool is designed to remove material from surfaces, producing a smooth finish on wood, plastic, or metal. It operates by using a sanding sheet or disc that rotates or oscillates, effectively stripping away rough spots, splinters, or imperfections on the surface.

In woodworking, sanding is an essential step before painting or finishing to ensure a clean, smooth area that will accept finishes evenly. It also helps to prepare surfaces by eliminating any old finishes or rough edges. The portability of the electric sander further enhances its convenience, making it easy to move around different project sites or areas in a workshop.

Other options, while they may involve tools used in a construction or crafting context, do not align with the primary use of a portable electric sander. For instance, cutting non-metallic pipe involves saws, while making cuts in wood typically requires a saw as well. Applying putty is a task associated with filling gaps or imperfections rather than smoothing surfaces, which is the specific function of the sander.