Sandpaper Sheets and Discs

Sandpaper sheets and discs strip old finishes, smooth wood and drywall, and get your surface ready for paint or stain. Buy the starting grit and the finer grits together. Each finer grit removes the scratches left by the previous one, and that is what separates a finished sanding job from scratches showing through your finish.

Sandpaper grit: what 60, 120 and 220 actually do

Lower grit numbers mean larger abrasive particles and a heavier cut. Higher numbers mean finer particles and smaller scratches. Choose your first grit by what needs removing, then work toward the surface you want to finish.

For wood, this is how the common numbers divide up:

Sandpaper grit	Job	Buying decision
60	Strip paint and initially smooth rough wood	Buy it for removal work that needs a coarse cut.
100 or 120	Remove minor cutting and milling marks	Start here when the wood needs smoothing rather than stripping.
150	Refine minor surface imperfections	Buy it to carry the smoothing work forward before finer sanding.
180 or 220	Final wood preparation before finishing	Use it to remove the scratches left by earlier sanding.
320	Refine finishes and sand between coats	Buy it for finish work after the heavier sanding is done.

What is 120-grit sandpaper used for? Smoothing milling marks and minor imperfections in wood is its main job here. It is a good starting point on a board that is already reasonably smooth. Starting that board with 60 grit creates deeper scratches you then have to remove.

For wood preparation, 100 and 120 grit are fine utility grades; 150, 180 and 220 are very fine. Buy 220-grit sandpaper for the later stages of wood preparation and for sanding between finish coats. It is finishing paper, so give it a surface already brought through the earlier sanding stages.

For Montana’s spring deck-staining jobs, 60 or 80 grit belongs on wood that needs old finish removed or rough areas smoothed. Start with the actual condition of the boards. A maintenance recoat and a stripping job need different first cuts.

The 3,000-grit sandpaper search takes you into polishing work. That number falls within the 1,500–4,000 range used for wet sanding imperfections and polishing after clear coat. Keep that work separate from smoothing bare wood or drywall.

Open-coat aluminum oxide sandpaper for pine and fir

Buy 9-by-11-inch open-coat aluminum-oxide sandpaper for pine and fir. Open-coat construction leaves space for sanding dust, which matters on soft, resinous wood. That is a useful feature on the lodgepole pine and Douglas fir common in Flathead homes and timber work.

Aluminum oxide suits wood, metal and paint preparation. The open coat is the reason to choose this version for resinous wood: material buildup can clog the abrasive and put scratches back into the surface you are trying to smooth.

Use light, steady pressure and follow the grain when hand sanding wood. Pushing harder can remove material unevenly. Let the grit cut, and replace the paper when its cutting action falls off.

Aluminum oxide sandpaper sheets for everyday preparation

Aluminum-oxide sheets are the everyday choice when your work moves between wood, metal and painted surfaces. The 9-by-11-inch sheets in 150 and 180 grit suit the finer preparation stages on wood. Buy 150 grit to work out minor imperfections, then 180 grit to refine the surface before finishing.

For sandpaper and a sanding block, the sheet does the cutting and the block spreads pressure along it. That combination is worth using on flat work because it helps distribute pressure evenly. Flexible paper makes more sense around profiles and small interior spaces.

Backing weight matters as well as grit. A-, B- and C-weight papers suit hand sanding; heavier D-, E- and F-weight papers suit quarter-sheet sanding. Lighter paper bends more readily, while heavier backing supports demanding sanding work. Choose the backing for how you will use the sheet.

Wet sandpaper and fine-finishing sheets

Wet sandpaper is made for use with water or another suitable lubricant. The liquid helps carry away sanding debris, limit clogging and dissipate heat. Buy wet/dry paper for that job. A fine grit number alone does not make ordinary dry paper suitable for water.

Waterproof silicon-carbide sheets are one wet/dry construction, using abrasive bonded to latex-backed paper. Both the abrasive and the backing must suit wet use. Aluminum oxide covers a wide range of dry preparation work, but that versatility is not a reason to soak an ordinary dry sheet.

Wetordry sheets in 220, 320, 400 and 600 grit give you choices for progressively finer finish work. Buy 220 or 320 for refining a finish between coats, and 400 or 600 for finer smoothing and polishing of finished surfaces. The 9-by-11-inch Wetordry sheets in 220, 320 and 400 grit give you the full-sheet format for hand work.

For finer work, 3M’s 800-grit sheets measure 3-2/3 by 9 inches, and its 1,500-grit sheets measure 3.66 by 9 inches. The 800-grit paper belongs in fine finishing; 1,500 grit moves into the range used for wet sanding clear-coat imperfections and polishing.

For car-paint work, separate preparation from polishing. The grit ranges are 320–400 for final sanding before primer, 600–800 before paint, and 1,500–4,000 for wet sanding imperfections after clear coat. Those are different stages, so buy paper for the stage you are doing.

On wood, keep wet sanding focused on coated surfaces. Excess water can swell wood; dry sanding is the straightforward choice for initial smoothing of bare cabinet parts during Montana’s winter renovation season.

What grit sandpaper for drywall and spackling?

Buy 150-grit drywall sandpaper for feathering a repair that is already close to level. For rough dried compound, start with 120 grit and move to 150. For final refinement before paint, the useful range is 150–220 grit.

The 150-grit hook-and-loop drywall sheets are the direct pick for feathering with a compatible hook-and-loop tool. Gator’s 100-grit clamp-on drywall paper is the pick for leveling dried ridges with a clamp-style tool. Its 80-grit drywall paper belongs on heavier leveling work and hard-setting compound.

For a small spackling repair, get the dried patch close to level, then use 150 grit to blend it into the surrounding surface. Deep gouges need filling and drying before sanding. Grinding down the whole patch to chase a gouge makes extra work.

Coarse drywall paper has a useful job, but keep it on the compound that needs leveling. Excessively coarse sanding can damage the drywall’s paper facing and leave it fuzzy. Move to the finer grit as soon as the ridge is gone.

3M’s 3-2/3-by-9-inch 100-grit drywall sheets provide another sheet format for leveling work, while its fine-grade drywall paper serves the finer end of the job. Choose the attachment to match your sanding tool before choosing the pack.

Winter is interior renovation season in Montana, and drywall sanding puts dust into occupied rooms. A sanding system that captures dust with a vacuum is worth using for that work. Keep dust collection separate from the abrasive choice: the paper’s job is to cut the compound cleanly.

General-purpose 9-by-11-inch sandpaper sheets

For hand preparation across several jobs, buy full sheets in the grits the work needs. The 3M 9-by-11-inch sheets cover 60, 100, 150 and 220 grit, with an assorted pack as another choice.

Buy 60 grit for coarse removal, 100 grit for minor milling imperfections, 150 grit for further smoothing and 220 grit for final preparation or between-coat work. An assorted pack suits mixed repairs; individual grit packs make more sense when you have a roomful of trim needing the same stage of preparation.

Clean away dust and debris between grits. Leftover material can clog fresh paper and scratch the surface. Moving to a finer number only helps when that paper is actually cutting the previous scratches away.

Sanding discs: match the diameter and attachment

Festool discs include a 5-inch 180-grit choice and 6-inch choices in 100, 180 and 320 grit. For wood preparation, 100 grit handles minor surface imperfections, 180 grit refines the surface before finishing, and 320 grit serves finer finish work. Buy the diameter that matches your sander’s pad.

What is hook-and-loop sandpaper? It is an abrasive with a backing that attaches through small hooks and loops. Hook-and-loop discs need a hook-and-loop pad of the same diameter, and matching dust holes help the extraction system work effectively. Diameter alone does not settle the fit.

PSA means pressure sensitive adhesive. Treat adhesive attachment and hook-and-loop attachment as separate buying choices. Get the right attachment first, then buy the grits for your sanding sequence.

Precut third-sheet and quarter-sheet sandpaper

Buy precut paper when you want the sheet format already sized for your sanding setup. The 3M third-sheet choices include 3-2/3-by-9-inch paper in 120, 180 and 320 grit, plus an 80-grit No Slip third-sheet option. Choose 120 for smoothing minor wood imperfections, 180 for finer preparation and 320 for finish work.

Diablo’s 4-1/2-by-5-1/2-inch sheets come in 40, 60 and 100 grit. The 40- and 60-grit choices are for stripping and initial smoothing; buy 100 grit when you are working on smaller imperfections. Quarter-sheet aluminum-oxide/ceramic paper in 220 grit covers the finer end of wood preparation.

The shape saves preparation at the bench, but grit still determines the cut. Buy a coarse sheet for removal and a finer sheet for the scratches that removal leaves behind.

The Pick

Buy 9-by-11-inch open-coat aluminum-oxide sheets for Flathead pine and fir. For general wood preparation, choose 3M full sheets in 100, 150 and 220 grit, adding 60 grit when you need to strip an old finish.

For drywall, buy Gator 100-grit clamp-on paper to level dried compound and 150-grit hook-and-loop sheets to feather repairs with the matching tool. For wet finishing, buy Wetordry in the grit your finishing stage needs. For powered sanding, choose Festool discs or precut 3M and Diablo sheets that match your sanding setup, then buy the progression together.

Frequently Asked Questions

What grit sandpaper should you use on drywall?

Drywall sandpaper in 120 grit is a practical starting point for rough dried compound, followed by 150 grit for feathering; 150–220 grit suits final refinement before paint. For a spackling repair that’s already nearly level, start with the finer work instead of cutting deep scratches into it. Shine a light across the patch to reveal ridges and low spots, and keep coarse sanding off the surrounding paper facing.

What grit sandpaper should you use on wood?

Start with the condition of the wood: 60 or 80 grit suits rough lumber, while 100 or 120 grit handles minor milling marks. That’s where 120-grit sandpaper earns its reputation as a useful preparation grade: it smooths imperfections without the heavier cut of stripping paper. For wood you’re painting, 150, 180 and 220 grit cover the finer preparation stages. Work through progressively finer grits, removing the previous scratches before moving on.

What grit is fine sandpaper?

Fine sandpaper isn’t one fixed number across every sanding job. For wood, 100 and 120 grit are fine utility grades, while 150, 180 and 220 are very fine. Choose by the work left to do: smoothing a milling mark needs more cut than refining an already smooth surface. A higher number won’t make the job faster if it’s too fine to remove the imperfection.

What is wet sandpaper?

Wet sandpaper has an abrasive and backing suited to sanding with water or another suitable lubricant. The liquid carries away debris and helps control clogging and heat, but a fine grit number alone doesn’t establish wet-use suitability. Use paper rated for wet sanding, keep your pressure light, and clear away buildup before it scratches the finish.

What grit sandpaper removes paint from wood?

For paint removal, 40, 60 and 80 grit provide the coarse cut used for stripping and initial smoothing. Match that cut to how much finish needs removing; an excessively coarse start can take wood along with the paint and leave deep scratches. Once the removal work is done, move through finer grits instead of trying to make the coarse paper produce a finished surface.

What is hook-and-loop sandpaper?

Hook-and-loop sandpaper attaches through small hooks and loops on the abrasive backing and sanding pad. For a round disc, use a hook-and-loop pad of the same diameter and match the dust-hole pattern so extraction can work effectively. Check both before fitting the disc; matching diameter alone doesn’t settle the fit.

Should you use sandpaper with a sanding block?

On flat work, wrapping sandpaper around a block helps spread your pressure evenly along the sheet. Keep that pressure light and consistent rather than bearing down on a stubborn spot. For profiles and small interior spaces, lighter paper flexes more readily to follow the shape.