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Choose sandpaper by the job, not by a fixed grit sequence. Use the coarsest abrasive that will remove the defects or stock you actually need to remove, then move to finer grades until the scratches match the surface and finish you want. For planed or shaped wood with visible blemishes, Norton Abrasives gives 80 grit as a typical starting point; if the wood is already clean and blemish-free, 100 grit may be enough. Heavy stripping, shaping and dimensioning can require 40–60 grit, while final finish work may reach 360–400 grit.
The correct sequence also depends on whether you are sanding bare wood, primer, paint or a sealer coat. Finish-maker instructions take priority for a specific product. Sand with the grain, remove dust before changing grits, and check whether the package uses FEPA P grades or CAMI numbers because equal-looking fine-grit numbers are not necessarily equivalent.
What sandpaper grit means
Grit is a size classification for the abrasive particles on the paper. Lower numbers indicate a coarser abrasive that cuts more aggressively; higher numbers indicate a finer abrasive that leaves a smaller scratch pattern. Coarse paper removes material quickly but can leave deep scratches. Fine paper produces a smoother surface but removes defects slowly.
That trade-off is why a grit is never “best” in isolation. A board with planer marks, glue residue or a dent needs a different starting point from a board that only needs a light key for stain. Start with the finest grit that will still solve the current problem. Starting too coarse wastes wood and creates scratches that later passes must remove; starting too fine can make the job slow without improving the result.
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- [Boshcraft Sandpaper Assortment] The 1/4 sheet sandpaper is 4.5" x 5.5”, 8 sheets of each 80/150/320/400 grit 9 sheets of each 120/220 grit, you can distinguish sandpaper from coarse to fine by the grit number at a glance. Assorted sandpaper is excellent to sanding for hand/ block/ palm sander/machine.
- [2 × Longer Lasting] Highly abrasives sandpaper are made of premium aluminum oxide for a sharp cut and uniform finish, which is 2× longer lasting than conventional abrasive papers. These sand papers provide perfect sanding performance with lower cost, fewer sheets, and less waste.
- [Strong Adhesives and No Slip] Double adhesives of other ordinary sandpaper, easy on, no-slip, and convenient to replace. Firm sandpaper produce the perfect polishing effects.
- [Anti-Clogging Coating] Sandpaper with an additional no-clog coating which has the maximum resistance to clogging, anti-static ability, and not easy to drop the sand. Provide exceptional sanding performance to increase your productivity, reduce material consumption and save costs.
- [Widely used sandpaper] Coarse to fine sandpaper sheets are ideal for sanding on all types of surfaces. Use them for aggressive sanding on automotive paint,fillers. Removing scratches on metal, wood, paint, and wood furniture.
Quick grit guide for woodworking tasks
| Grit or range | Typical use | What to expect |
|---|---|---|
| 40–60 | Heavy sanding, stripping, dimensioning or shaping | Fast stock removal; leaves pronounced scratches that require several refining passes. |
| 80–120 | Smoothing surfaces and removing small imperfections | Useful for correcting ordinary defects after rough work. |
| 150 | Fine surface preparation | Refines the scratch pattern before finish preparation. |
| 180 | Final surface smoothing and initial between-coat work | Often a transition into finish-specific sanding. |
| 220 | After priming or staining; paint preparation | Fine preparation, provided the coating manufacturer allows it. |
| 320 | Between finish coats | Removes small raised fibers or dust nibs without aggressive cutting. |
| 360–400 | Final finish work | Very fine abrasion for the last refinement stage. |
These ranges are a decision guide, not a mandatory ladder. You may begin at 80, 100, 120 or a coarser grade depending on the surface. The next grit should remove the visible scratches from the previous pass without undoing the progress you made.
How to choose a starting grit
Planed or shaped wood with blemishes
For planed or shaped wood that has visible blemishes, Norton’s bare-wood guidance uses 80 grit as a typical starting point. This is coarse enough to level ordinary imperfections while remaining more controlled than a 40- or 60-grit abrasive.
Clean wood with no visible blemishes
If the wood has no blemishes, Norton gives 100 grit as an example starting point. Beginning at 100 avoids unnecessary deep scratches while still preparing the surface for finer sanding.
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Major stock removal or shaping
Use the 40–60 range when you must strip an existing surface, change a profile or remove substantial material. Keep the abrasive moving and check the shape frequently: coarse paper can remove material faster than expected. Once the profile or level is correct, change to a finer grade rather than trying to make the coarse scratches acceptable with prolonged pressure.
Light smoothing
When the surface is already flat and only has minor roughness, 120 grit may be sufficient as the first pass. If you start finer than the defects warrant, you may spend longer sanding without actually leveling them.
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- 4 Different Grits: Includes 8 sanding blocks in 4 grits—60/80/120/220 (coarse, medium, fine, and superfine), 2 blocks per grit; our sanding sponge is reusable, washable, and suitable for all your sanding needs
- Perfect for Hand Sanding: Measuring 4" x 2.75" x 0.65", this sanding block is easy to carry and use, ideal for handheld work, and perfect for areas a power sander may miss or find hard to reach
- Robust & Durable: Crafted with high-elastic sponge and premium brown corundum, this sanding sponge ensures excellent flexibility and long-lasting performance without grain loss, thanks to its special treatment and unique glue formula
- Easy Identification: Grit numbers are printed directly on the sanding sponge for quick selection; choose lower numbers for rough sanding and higher numbers for finishing, ensuring the right grit for every task
- Wide Use: Ideal for polishing flat and irregular surfaces, this sandpaper is perfect for sanding putty, woodworking, furniture finishing, metal polishing, and primers—great for any home renovation project
A practical grit sequence
- Inspect and identify the problem. Look for scratches, dents, glue spots, planer marks, raised fibers, old coating or a shape that needs changing. Decide whether you are removing material or merely refining it.
- Select the finest effective starting grit. Use the surface condition rather than a memorized sequence: 40–60 for heavy removal, about 80 for a blemished planed surface, or about 100 when blemishes are absent.
- Sand until the current defects are gone. Do not stop simply because the surface feels smoother in one area. Use consistent strokes and inspect under good light so remaining defects are visible.
- Clean the surface. Remove sanding dust before changing grit. Dust left behind can interfere with the next pass and make it harder to tell which scratches belong to which abrasive.
- Move to the next finer grade. Choose a grade that can erase the previous scratch pattern. The exact jump depends on how aggressively the first grit cut and how smooth the surface already is.
- Repeat inspection and cleaning. After each pass, remove dust and check for leftover scratches before proceeding. If scratches from the previous grit remain, stay with the current grade rather than moving finer.
- Stop at the finish’s required preparation grade. A surface intended for stain, paint or a clear finish may need a different final grit. Follow the coating maker’s preparation instructions.
There is no universal “80-120-180-220” recipe that fits every board. A badly damaged surface needs more correction before refinement; a clean surface may need fewer passes.
What grit should I use on bare wood?
For bare wood, choose according to how much correction is required. Norton’s examples are 80 grit for planed or shaped wood with blemishes and 100 grit when blemishes are absent. Continue through finer grades as needed: 120 for general smoothing, 150 for fine surface preparation, and 180 for final surface smoothing. Some projects continue to 220, but the finish maker’s instructions should determine the final preparation.
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Remove dust between grit changes. A clean surface lets the next abrasive cut predictably and prevents loose particles from acting like random coarse grit.
Choosing grit for stain, sealer, primer and paint
After staining or priming
Norton’s chart places 220 grit after priming or staining. Use this only when the product system permits sanding at that stage. Some coatings need to cure for a specified time, and sanding too soon can tear or clog the film.
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- Assortment Pack: This sanding sponge set includes 24 pieces with grits 80/120/180/240/320/400/500-600/800-1000/1200-1500/2000/2500/3000,each of 2, covering coarse material removal (80 grit) to ultra-fine polishing (3000 grit). Perfect for wood furniture refinishing, auto bodywork, and delicate surface prep—all in one convenient kit, each measuring 3.93 x 2.75 x 0.19 inches
- Durable & Comfortable Design: Made with a soft sponge buffering layer, these sanding blocks absorb vibrations, reduce hand fatigue, and provide a secure grip. The high-quality abrasive material ensures long-lasting use without tearing.
- Wet & Dry Use: Designed for both wet sanding paper (reduces dust, extends lifespan) and dry sanding (quick material removal). Perfect for automotive refinishing, wood furniture refinishing, and DIY projects.
- Ergonomic & Contours Easily: The sanding block shape fits comfortably in hand, while the flexible foam adapts to curves and tight corners, ensuring even sanding on flat or irregular surfaces.
- Wide Professional & DIY Applications: Whether you're polishing drywall, smoothing wood furniture, or prepping metal/auto surfaces, these sanding sponges are essential for craftsmen, carpenters, and home renovators.
Between coats of oil- or water-based finish
For sanding the first sealer coat, Norton gives 180–220 grit as examples for oil- or water-based finishes. The appropriate choice depends on the coating and how much leveling is needed. Use the least aggressive grade that removes raised fibers or minor dust without cutting through the sealer unnecessarily.
Between coats of paint
Norton lists 220 grit as an example for paint. Paint systems vary, so confirm the product directions before sanding. If the coating is soft, under-cured or thin, even a nominally fine abrasive can expose the substrate.
Later finish coats
Norton’s chart lists 320 grit for between-coat sanding and 360–400 for final finish work. These fine grades are intended to refine an already prepared film, not to correct deep defects in the wood underneath. If you can still see a coarse scratch, return to the appropriate earlier stage rather than trying to polish it out with 400 grit.
Can I skip grits when sanding?
You can skip a grade when the current scratch pattern is already close to the result you need, but do not skip the correction the surface requires. The next abrasive must be capable of removing the previous grit’s scratches. Jumping from a very coarse grade directly to a very fine grade usually leaves deep marks behind and lengthens the job.
For example, if 80 grit has leveled a blemish but left obvious scratches, a medium grade such as 120 can refine them before 150 or 180. If 100 grit has left a clean, uniform surface, you may need fewer intermediate steps. Inspect rather than following a fixed number of passes. A grit change is justified when the current grade has done its job and the next grade can remove its scratch pattern efficiently.
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- COMPREHENSIVE GRIT RANGE & COLOR-CODED EFFICIENCY: This sand paper assortment pack includes 64 premium sandpaper sheets assortment featuring 8 grits (60,80,120,150,180,240,320,400) with color-coding: Yellow(60/80), Green(120/180), Blue(240/320), Purple(150/400). The system ensures quick identification and smooth progression from coarse to fine finishing. These reliable 1/4 sheet sandpaper suit woodworking, metal polishing, and automotive projects
- SHARP & CONSISTENT CUTTING: Our sandpaper sheets assortment are engineered with premium aluminum oxide, a material known for its exceptional durability and self-sharpening properties. This ensures a fast, aggressive cut and consistent performance over a longer lifespan compared to other abrasives. The result is a smoother, more efficient finish on wood, metal, and drywall, reducing waste and delivering greater value
- VERSATILE WET AND DRY SANDING APPLICATIONS: Engineered for both wet and dry sanding, this 1/4 sheet sandpaper offers ultimate flexibility. Use it dry for efficient wood sanding and metal polishing, or with water for automotive paint repair to minimize dust and achieve a flawless, swirl-free surface. The robust latex paper backing withstands both conditions without tearing
- UNIVERSAL 1/4 SIZE & SUPERIOR ANTI-CLOGGING DESIGN: Each sheet measures 5.5" x 4.5", the standard 1/4 size that perfectly fits most palm sanders and square sanders. It can also be easily trimmed for hand sanding blocks. Featuring a special anti-clogging coating, these sheets resist loading up with material from drywall or wood, ensuring exceptional sanding performance and increased productivity
- DURABLE, FLEXIBLE & SECURE ADHESION: The tear-resistant latex backing provides exceptional durability and flexibility to conform to curved surfaces and intricate edges. With strong adhesives, these 1/4 sheet sandpaper grip your sander securely without slipping, guaranteeing smooth and vibration-free operation for both hand and power tool use
FEPA P grades versus CAMI numbers
Sandpaper packages may use FEPA grades marked with a “P” (such as P180) or CAMI numbers (such as 180). These are different grading systems. The Compel Group’s comparison chart notes that the scales diverge at finer grits, so two products carrying the same apparent number should not automatically be treated as identical.
Read the complete label, including the grading system and the grit prefix. If you are replacing one product with another, match the system first or consult the manufacturer’s conversion information. Treat conversion charts as guidance rather than assuming a perfect one-to-one match, particularly for fine abrasives.
Match the abrasive format to the work
Choose a sheet, disc or other format that fits the way you will sand. Hand sanding often favors a sheet that can be folded or wrapped around a block; a power sander requires the size and hole pattern specified for its pad. The format affects control, dust collection and how evenly pressure is distributed, but it does not change the basic grit decision.
- For hand work: Use a firm block on broad flat areas so fingers do not create hollows. Reserve unsupported paper for edges, profiles and areas where a block cannot reach.
- For a power sander: Use the abrasive format designed for that tool and keep the tool moving. Let the abrasive cut instead of forcing it into the surface.
- For profiles and edges: Select a format that follows the shape without rounding corners unintentionally. Check the edge often because coarse paper can change it quickly.
The supplied evidence does not establish a particular backing material, adhesive system or product listing as superior, so compare those attributes only when a manufacturer provides task-specific information.
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Common sanding mistakes and fixes
Starting too coarse
Symptom: Deep scratches remain after the defect is gone. Fix: Move through enough intermediate grades to remove the coarse pattern. Do not keep pressing harder with a fine abrasive; pressure can create unevenness and shorten abrasive life.
Best Value
- 【Boshcraft Sandpaper Assortment】- The full size of sandpaper is 9 x 11 inches, 3 sheets of each 60/120/320 grit premium sandpaper, 3 sheets of 600/800/1000/1500/2500 grit wet sandpaper, you can distinguish sandpaper from coarse to fine by the color and the grit number at a glance. Assorted sand sheets are excellent to use for hand sanding, block sanding, and machine sanding.
- 【2× Longer Lasting】 - Highly abrasives sandpapers are made of premium aluminum oxide and silicon carbide for a sharp cut and uniform finish, which is 2× longer lasting than conventional abrasives. These abrasive papers provide perfect sanding performance with lower cost, fewer sheets, and less waste.
- 【Anti-Clogging Coating】 - Sandpaper for wood with an additional no-clog coating which has the maximum resistance to clogging, anti-static ability, and not easy to drop the sand. Provide exceptional sanding performance to increase your productivity, reduce material consumption and save costs.
- 【Wet or Dry Sanding】 - Waterproof sandpaper minimizes scratches, removes loose abrasive particles, and reduces airborne dust for wet and dry sanding purposes. Wet sandpaper perfect for using on your pool, water pump or auto body.
- 【Versatility】- Wet and dry sandpaper can be used on a variety of materials, including metal, plastic, and automotive finishes. It's commonly used in auto body work, woodworking, and for polishing surfaces.
Starting too fine
Symptom: A dent, glue spot or planer mark remains after a long sanding session. Fix: Drop to the finest grit that can actually level the defect, then return to finer grades once the surface is uniform.
Cross-grain scratches
Symptom: Marks appear after finishing even though the surface felt smooth beforehand. Fix: Sand with the grain and blend the entire area, not just the center of the defect.
Dust between passes
Symptom: Unexpected coarse scratches or an inconsistent finish. Fix: Remove dust before every grit change and inspect the surface under strong, angled light.
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Symptom: The finish is cut through, uneven or gummy. Fix: Identify the coating and stage first. Use the finish maker’s specified grit and cure time; the bare-wood recommendation is not automatically appropriate for a sealer or paint.
Confusing grading systems
Symptom: A replacement abrasive marked with the same number cuts noticeably differently. Fix: Check for the FEPA “P” designation versus CAMI numbering before comparing grits.
A simple decision checklist
- Am I removing heavy stock, correcting a defect, smoothing bare wood or abrading a coating?
- What is the finest grit that will remove the current problem efficiently?
- Have I selected the correct grading system, FEPA P or CAMI?
- Will this grit and format fit my hand tool or power sander?
- Am I sanding in the direction of the grain?
- Have I removed dust before changing grits?
- What grit and cure-time instructions does the finish manufacturer specify?
- After this pass, can I still see scratches from the previous grit?
Safety and finish quality
Wear eye protection and a suitable dust mask or respirator for the material and tool, and use dust collection where available. Keep the workpiece secured so it cannot move into the abrasive. Fine finish sanding is not a substitute for correcting an underlying defect: if a scratch remains, identify which earlier pass caused it and return to that stage.
For the most predictable result, record the grit and grading system used on each project. That makes it easier to reproduce a surface preparation schedule when you use the same finish again, while still allowing the finish maker’s current instructions to override a general chart.
Quick Recap
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