Use a light pencil map and low-angle inspection light to reveal missed areas and old scratches before changing sandpaper grit.
Learn when a wet sanding pad helps control pressure, which grits fit wet work, and when to use sheets instead of a power disc.
Learn when 5 inch sanding discs make sense, how to choose grits, and when to switch back to hand sheets for edges and inspection.
Learn where 800 grit sandpaper fits, when to wet sand with it, and how to inspect the surface before moving to 1000 grit or polish.
Learn when 80 grit sandpaper is the right coarse step, when it is too aggressive, and how to move toward 100 or 120 grit without leaving deep scratches.
Learn what 60 grit sandpaper is used for, when it is too aggressive, and how to move toward finer grits without leaving deep scratches.
Learn where 360 grit sandpaper fits after 320 grit, how to inspect the surface, and when to step finer.
Learn where 320 grit sandpaper fits after 280 grit, when it is useful between coats, and when to move to 360 or 400.
Learn what 3000 grit sandpaper is used for, when to wet sand with it, and how to decide whether the surface is ready for polishing.