This sanding grit guide is based on common industry practices used in automotive refinishing and general surface preparation.
Keep in mind that every situation can vary depending on the material, tools, and desired finish. When in doubt, it’s usually safer to start with a finer grit and move to a coarser one only if more material removal is needed. Always double-check the recommendations for the specific products and materials you’re working with. This tool is meant as a practical guide, not a strict rulebook.