Wood Sanding

Sanding paper grading refers to the coarseness or fineness of the abrasive particles on the sandpaper, which determines its effectiveness for different stages of wood sanding. The grading (grinding) is typically represented by a number known as the "grit" of the sandpaper. Here's a general guide:

Extra Coarse Grits (16-36): This grade of sandpaper is the most aggressive and is primarily used for initial material removal on very rough wood surfaces, such as rough sawn lumber or heavily weathered wood. It's also effective for stripping old paint or finishes from large surfaces quickly.

Coarse Grits (40-60): These are used for heavy material removal and shaping, especially for rough wood surfaces or removing old finishes and paint. They are not typically recommended for fine woodworking as they can leave deep scratches.

Medium Grits (80-120): Suitable for general sanding tasks like removing scratches, leveling uneven surfaces, and preparing the wood for finishing. They are often used after coarse sanding to refine the surface further.

Fine Grits (150-180): These grits are used for smoothing out the surface, removing any remaining scratches from the medium grit sanding, and preparing the wood for staining or painting. They provide a smoother finish and are often used before applying finishes.

Very Fine Grits (220-240 and higher): Reserved for final finishing touches and achieving a smooth, polished surface. They are ideal for sanding between coats of finish to ensure a flawless result, as well as for sanding delicate wood species.

Choosing the right sandpaper grit depends on the condition of the wood and the desired finish. Starting with a coarse grit and gradually progressing to finer grits will yield the best results, as it ensures a smoother surface without leaving visible scratches. It's also important to use proper sanding techniques, such as sanding with the grain of the wood and applying even pressure, to avoid damaging the surface.