The grit size of sandpaper for sanding depends on the specific material being sanded and the desired outcome. Let's look at some common scenarios!
01 Sandpaper for wall surface sanding
Coarse sanding: Generally, 80-120 grit sandpaper is used to remove major imperfections, unevenness, and old paint layers from the wall surface. This can quickly smooth the wall, but may leave noticeable scratches.
Fine sanding: 180-240 grit sandpaper is commonly used for further smoothing the wall surface, reducing scratches from coarse sanding, and preparing the surface for subsequent plastering or painting.
Final polishing: 320 grit or higher (e.g., 320, 400, 600 grit) is used for the final polishing, achieving a very smooth and even surface. This ensures that paint or coating adheres evenly, resulting in a beautiful finish.
02 Sandpaper for Wood Polishing
Coarse Grit: For initial sanding of rough wood, use 80-120 grit sandpaper to quickly remove burrs, unevenness, and major imperfections, preparing the surface for further sanding.
Medium Grit: 150-320 grit sandpaper is suitable for secondary sanding of wood surfaces, such as before applying a primer to furniture. It smooths the surface, preparing it for painting or staining.
Fine Grit: 400-600 grit or higher sandpaper is used for fine polishing of wood, such as for high-end furniture or musical instruments. It achieves a mirror-like smoothness, enhancing the texture and aesthetics of the wood.
03 Sandpaper for Metal Polishing
Rust Removal and Paint Removal: Generally, 60-120 grit sandpaper is used to quickly and effectively remove rust and old paint from metal surfaces, preparing them for further surface treatment and coating.
Initial Polishing: 150-400 grit sandpaper can be used for initial polishing of metal surfaces, removing unevenness and minor imperfections, resulting in a smoother surface.
Fine Polishing: 600 grit and higher grit sandpaper is used for fine polishing of metals, such as the final polishing of stainless steel parts, achieving a high-gloss finish and enhancing the appearance and performance of the metal product.
04 Sandpaper for Polishing Collectibles
Initial Polishing: For wooden collectibles, use 800 grit sandpaper for an initial, uniform sanding. For stone collectibles, use 200 or 400 grit sandpaper for the surface. For more delicate items like amber, use 150 grit sandpaper for the initial sanding.
Fine Polishing: After initial polishing, gradually increase the grit size, such as 1000, 1500, 2000, etc., for further polishing and smoothing. Finally, use 2500 and 3000 grit sandpaper repeatedly to achieve the desired surface quality.
