The grit you need depends on the job. To strip car paint down to bare metal, use a coarse 40 to 80 grit. To shape body filler and feather the edges, move up to 180 then 320. For primer, use 400 to 600. To scuff old paint before you repaint, use 600 to 800. And to wet sand a clear coat for a glass-smooth finish, work up through 1500, 2000, and 3000 grit. Pick the grit by the stage you are at, and always move from coarse to fine.
- A quick grit chart for car paint
- What grit to strip car paint to bare metal?
- What grit for body filler and primer?
- What grit to scuff paint before repainting?
- What grit to wet sand clear coat?
- Wet sanding or dry sanding: when to add water
- Hand sanding or a power sander?
- What grit for a small spot repair?
- Common mistakes that ruin the finish
- Conclusion
- Frequently asked questions
- Related Articles
That one rule, coarse to fine, is the heart of every paint job. The rest of this guide walks through each stage, gives you the exact grit for the task, and shows you how to dodge the mistakes that leave swirl marks or sand straight through your finish.
A quick grit chart for car paint
Here is the full range at a glance. Keep it nearby while you work, because the right number changes at every step.
| Grit | Best for |
| 40 to 80 | Stripping paint to bare metal, grinding down thick body filler |
| 180 | Shaping body filler, feather-edging chipped paint |
| 320 | Final filler sanding and smoothing before primer |
| 400 | First sanding pass on dried primer |
| 600 | Final primer sanding before the base color (wet or dry) |
| 800 | Scuffing old paint so new paint grips |
| 1000 to 1200 | Spot-sanding runs or dust nibs in the base color |
| 1500 | First wet pass on clear coat to level orange peel or runs |
| 2000 | Refining the clear coat after 1500 grit |
| 3000 | Final wet pass before machine polishing |
Higher numbers mean finer paper. A low number like 40 has large, rough grains that cut fast and leave deep scratches. A high number like 3000 has tiny grains that barely remove material and leave a surface smooth enough to polish to a shine. Each stage below picks up where the last one left off, which is why skipping around causes trouble.
What grit to strip car paint to bare metal?
Use 40 to 80 grit to take paint down to bare metal. 80 grit is the common choice because it cuts through old paint and primer fast without gouging the steel underneath. Drop to 40 grit only for thick, stubborn layers or heavy rust, and expect deep scratches you will need to sand out later.
Once the metal is clean, switch to 180 grit to smooth the surface and feather the edges where old paint meets bare metal. Feathering means tapering that hard paint edge into a gentle slope, so it will not show as a ridge under your new primer. Skip this and the line can telegraph right through the finished paint.
If you are only sanding out a small chip and not going all the way to metal, you rarely need anything this coarse. Start at 180 or 320 grit and keep the damaged area contained.
What grit for body filler and primer?
Body filler and primer each have their own grit range, and getting them right is what makes the final paint lie flat.
For body filler, start at 80 grit to knock down the high spots once it has hardened, then shape it with 180 grit. Finish with 320 grit so the filler blends smoothly into the panel around it with no visible edge. Always sand filler dry, because water soaks into it and causes problems down the line.
For primer, the job is to flatten the surface so paint has a smooth bed to sit on. Use 400 grit for the first pass to level any texture, then 600 grit for the final sanding before your base color goes on. 600 grit leaves the surface fine enough that the scratches will not show through the paint, but still rough enough for the paint to grip.
A guide coat makes this stage almost foolproof. Dust a light mist of a contrasting color over the primer before you sand, then sand it off. The color clings to low spots and leftover scratches, so when it is all gone, you know the panel is truly flat.
A simple way to remember it: filler likes 80 to 320, primer likes 400 to 600. Every number you skip in between is a scratch you might see later.
What grit to scuff paint before repainting?
Use 600 to 800 grit to scuff existing paint before you repaint. You are not trying to remove the old finish here. You are just dulling the glossy surface so the new paint or clear coat has something to grab. Fresh paint sprayed over a slick, un-scuffed panel will peel.
For a full respray over sound paint, 800 grit is a safe all-around choice. It leaves fine scratches that fill in and vanish under the new coats. If the old paint is rough, chipped, or has runs, step back to 400 or 600 grit to level those problems first, then finish at 800.
Use a sanding block or a backing pad on flat panels so you do not leave finger grooves, and fold the paper into a softer tool for curves and body lines. Even pressure is what keeps the scuff uniform, and a uniform scuff is what keeps the new paint even.
What grit to wet sand clear coat?
Wet sand clear coat with 1500, then 2000, then 3000 grit, in that order. This is the stage that turns a decent paint job into a mirror finish, and it is where people either make the car look incredible or ruin the paint.
Start with 1500 grit to level orange peel, the bumpy texture clear coat dries with, or to cut down a run or drip. If the clear is fairly smooth already, you can start at 2000 grit and save yourself some risk. Move to 2000 grit to erase the 1500 scratches, then 3000 grit for the final pass that leaves the surface ready to polish.
After 3000 grit the paint will look dull and hazy. That is normal. A machine polisher with cutting and finishing compound brings the gloss back and removes the fine 3000 scratches, leaving the deep, wet shine you are after. For the very last cut before polishing, ultra-fine abrasives like 3M’s Trizact discs give an even more uniform finish than standard paper.
One rule matters more than any other here: let the clear coat cure before you touch it. Fresh clear needs at least 24 to 48 hours, and longer in cool weather, because the solvents have to fully gas out first. Sand it too soon and the paper gums up, the surface stays soft, and the paint will not level.
Wet sanding or dry sanding: when to add water
Use water once you reach the clear coat. Up to that point, through filler, primer, and scuffing, most sanding is done dry, though 600 grit primer can go either way.
Wet sanding means keeping the surface and the paper flooded with water, usually with a drop of dish soap mixed in. The water floats away the paint dust that would otherwise clog the paper and drag deep scratches across your finish. It also keeps friction and heat down, which protects a thin clear coat. For wet work, buy paper marked wet or dry, such as 3M’s Wetordry sheets, because standard dry paper falls apart once it gets soaked.
Soak your paper in water for a few minutes before you start, keep a bucket and a spray bottle within reach, and rinse the panel often so you can actually see the surface. Swap the paper out as soon as it stops cutting smoothly.
Hand sanding or a power sander?
You can do every stage by hand, but a dual action sander, often called a DA, saves real time on big jobs. A DA spins and vibrates at the same time, so it cuts fast without leaving the deep swirl marks a straight grinder does. Use it for the coarser work, through filler, primer, and the first clear-coat leveling, then finish the finest passes by hand for control.
Match the disc grit to the same stages you would use with sheets: 80 grit to shape filler, 320 to 400 on primer, and 1000 to 1500 to level clear coat. Keep the pad flat and let the weight of the tool do the work. Press down hard and you dig in and heat the surface, which is exactly how swirls and burn-through start.
For hand sanding, wrap the paper around a firm block or a foam pad. A block keeps flat panels flat, and a foam pad follows gentle curves without cutting the high spots away. Bare fingers leave grooves wherever a fingertip presses harder than the rest, so save freehand sanding for tight spots a block cannot reach.
What grit for a small spot repair?
Spot repairs call for a gentler approach than a full respray, because you want to blend into the paint you are keeping. For a stone chip or a shallow scratch, start at 320 to 400 grit to level the damage, prime the bare spot, then sand that primer at 600 grit before your color goes on.
Keep the sanded area as small as the damage allows. The wider you sand, the more paint you have to blend back in later. Once the fresh clear has cured, feather the edge of the repair into the surrounding paint with 1500 then 2000 grit wet, and polish the whole area so the repair disappears into the panel. Taking your time on this blend is what keeps a small fix from turning into a visible patch.
Common mistakes that ruin the finish
A few errors cause most sanding disasters, and all of them are easy to avoid once you know what to watch for.
Skipping grits is the big one. Jumping from 800 straight to 2000 grit leaves scratches the finer paper cannot remove, so they turn up after polishing. Climb the ladder in steps, and once you are in the fine range, never jump more than about 500 grit at a time.
Sanding through the clear is the other. Clear coat is often thinner than a sheet of paper, and the raised edges and body lines of a panel wear through first. Use light, even pressure, keep the panel wet, and check your progress often. If you see color coming up on your paper, stop. You have gone too far, and that spot now needs to be resprayed.
Two smaller mistakes round it out. Sanding dry when you should be wet clogs the paper and burns fine scratches into the clear. Sanding clear coat before it has cured wastes paper and paint both. Patience at each of these points is what separates a smooth finish from a do-over.
Conclusion
The right grit comes down to the stage you are working: 40 to 80 to reach bare metal, 180 to 320 for filler, 400 to 600 for primer, 600 to 800 to scuff before paint, and 1500 up to 3000 to wet sand clear coat. Always work coarse to fine, never skip more than a step or two, and keep the clear coat wet and fully cured. Do that, and you end up with a flat, even surface that polishes to a deep shine.
Frequently asked questions
Can I use regular sandpaper on car paint?
No. Use automotive wet or dry sandpaper made with silicon carbide. Regular hardware-store paper leaves coarse scratches and falls apart when wet, which is exactly when you need it most for clear coat.
Do I have to wet sand after painting a car?
Only if you want to remove orange peel, runs, or dust nibs and get a mirror finish. A clean spray job can look fine as is. For show-level gloss, wet sand with 1500 to 3000 grit, then polish.
What grit removes scratches from car paint?
For light clear-coat scratches, start at 1500 or 2000 grit wet, then polish. For deeper scratches that reach the color or primer, use 1000 grit first, then respray that spot.
What happens if I sand through the clear coat?
The color coat gets exposed, so the spot looks dull and will not polish back. The only fix is to repaint that area with base and clear. Light pressure and frequent checks prevent it.
How long should clear coat cure before wet sanding?
At least 24 to 48 hours at normal room temperature, and longer in cool or humid weather. Sanding sooner gums up the paper and the clear coat will not level properly.
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