The selection of abrasive paper, characterized by its grit number, is crucial for achieving a smooth, paint-ready surface after applying patching compound. Finer grits produce smoother results but remove less material, while coarser grits remove material more quickly but leave a rougher surface. As an example, 120-grit paper removes more material than 220-grit paper.
Proper preparation and surface refinement are essential for ensuring paint adhesion and preventing imperfections from showing through the final coat. Utilizing the appropriate abrasive strength allows for effective leveling and blending of the patching compound with the surrounding wall or ceiling, resulting in a professional-looking finish. Historically, various abrasive materials were used, but modern sandpaper provides a consistent and readily available option.
