Most woodworking projects do not need every grit on the shelf. Start with the least-aggressive grit that will fix the surface in front of you, then move up only far enough to erase the scratches from the last pass.
That means 80 grit has a place when you are flattening rough lumber, removing an old coating, or cleaning up serious machine marks. It is usually too aggressive for a board that already feels smooth. For fresh, reasonably clean stock, 120 is often a better starting point. From there, the right stopping point depends on the finish.
Start with the job, not a fixed grit sequence
Sandpaper numbers describe the size of the abrasive. Lower numbers cut faster and leave deeper scratches. Higher numbers refine those scratches but remove less material. The goal is not to reach the highest number. The goal is to leave a surface that suits the finish.
| If the surface looks like this | Start around | Then move to | Typical stopping point |
|---|---|---|---|
| Rough-sawn lumber, dried glue, or deep planer marks | 80 | 120, then 150 or 180 | Depends on finish |
| Fresh milled lumber with light machine marks | 120 | 150 or 180 | Depends on finish |
| Smooth plywood or a board that needs minor cleanup | 150 | 180 or 220 | Depends on finish |
| Previously painted wood that only needs a scuff | 150 or 180 | 180 or 220 | Follow the coating directions |
| Between finish coats | 220 to 320 | Usually no progression needed | Follow the finish directions |
Use the table as a starting point, not a rulebook. A soft pine board with tear-out may need more work than a clean maple panel. Veneer and plywood deserve extra caution because there is less material to remove.
A practical progression for bare wood
For many furniture and small-shop projects, 80, 120, 180 is a useful progression when the surface begins rough. If the stock is already in good shape, begin at 120 or 150 and skip the coarse paper entirely.
Spend enough time at each grit to remove the scratch pattern from the one before it. That is the part people rush. Moving from 80 straight to 220 can leave 80-grit scratches hiding in plain sight until stain or finish makes them obvious.
You also do not need to sand every square inch with a coarse grit just because one area has a problem. Spot-sand the defect carefully, then blend the surrounding area at the next grit. Keep checking your work under raking light. A low light aimed across the board will show swirls, scratches, glue squeeze-out, and uneven spots that overhead shop lighting can hide.
Where to stop before paint
Paint is forgiving compared with a clear finish, but it does not hide every sanding mistake. For bare wood that will be painted, 120 to 180 grit is usually enough for the final wood-sanding pass. If your primer or paint manufacturer gives a specific surface-prep direction, use that instead.
Do not polish bare wood to a very fine grit before paint. You want a clean, even surface, not a glossy one. After the primer dries, use the grit recommended on the coating label for a light scuff if the surface needs it. Remove the dust before the next coat.
Where to stop before stain
Stain is less forgiving because it can make uneven sanding and cross-grain scratches stand out. For many projects, a final pass at 180 is a sensible place to start. Some wood and stain combinations call for 220, while others may absorb color differently if you go too fine.
The finish label gets the last word here. Make a scrap sample from the same wood, sand it the way you plan to sand the project, and apply the stain. If you are working with a blotch-prone species, test any conditioner in the same sequence. A ten-minute sample can save a frustrating refinish.
Where to stop before a clear finish
For a clear finish, the final grit depends on the product and the look you want. A typical bare-wood sequence ends at 180 or 220. That is enough for many oil, polyurethane, and water-based finishes, but the product instructions should guide the final prep.
Going much finer is not an automatic upgrade. It can waste time, reduce how much material the paper removes, and change how a stain or finish behaves on some woods. Save the very fine abrasives for the finish itself when the coating directions call for them.
Sanding between coats is a different job
Between coats, you are not trying to reshape the wood. You are knocking down dust nibs and giving the next coat a clean, even surface to bond to. Use a light touch with the grit named by the finish manufacturer, often in the 220 to 320 range.
Stop as soon as the surface feels uniformly smooth. If you sand through an edge or expose bare wood, repair that area according to the finish system rather than piling on another coat and hoping it disappears.
Hand sanding versus a random orbital sander
A random orbital sander is efficient on broad, flat surfaces, especially in the early grits. Keep it moving, let the abrasive do the cutting, and avoid pressing down. Pressure can create pigtail swirls, heat, and uneven spots.
Hand sanding is slower, but it gives you control near edges, corners, profiles, and veneer. On the final pass, sand with the grain when you can. A sanding block helps keep flats flat and avoids finger grooves.
A simple sanding checklist
- Start as fine as the surface allows.
- Remove the previous grit's scratches before moving up.
- Keep the tool moving and use light pressure.
- Vacuum or wipe away dust between grits.
- Protect edges and veneered surfaces.
- Inspect under raking light before you finish.
- Test stain and finish on scrap when appearance matters.
- Follow the coating manufacturer's preparation and between-coat directions.
Good sanding is mostly restraint. Choose the starting grit that solves the problem, work through a sensible progression, and stop when the wood is ready for its finish. That same attention to surface prep is what makes a simple handmade piece, including a book holder or book valet, feel finished rather than rushed.
Explore Colwood Craft's handmade book holders and book valets when you are ready to see how finish-sensitive details come together in a finished piece.