How to Sand Cabinets Before Painting

Before you start

Know what you are sanding and why. Factory cabinets are usually sealed with a hard, slick topcoat, or they are laminate or a thin wood veneer. The old finish needs a mechanical key — a lightly abraded surface the primer can grab — but you do not want to cut through a veneer or laminate you cannot repair. So the rule is light pressure and fine grit, over the whole surface, in one pass.

Also sand after cleaning, not before. If you sand first and degrease second, you grind grease and cleaner into the fresh scratches. Degrease, dry, then sand — the order is covered in our degreasing guide.

Tools and materials

• 220-grit sandpaper — the standard scuff for sealed finishes and laminate.
• Sanding sponge (fine or medium) — wraps around profiles, recessed panels, and corners.
• Sandpaper block or pad — keeps flats even so you do not round edges or gouge.
• 320-grit paper — for smoothing primer and between topcoats.
• Tack cloth or damp microfiber — removes dust before priming.
• Dust mask and drop cloth — keeps dust out of your lungs and off the kitchen.

Surface preparation

Start clean. Wash and dry every surface so the paper is cutting the finish, not smearing grease. Then work in good light so you can see the sheen change — a sanded surface looks uniformly dull where the gloss used to be. Any shiny spot you miss is a spot the paint will eventually let go, so go over edges, around handles, and inside recessed panels where gloss hides.

This step is part of the larger prep sequence; see our surface preparation hub for the full checklist, and our how to paint kitchen cabinets guide for where sanding sits in the whole job.

Step-by-step method

1. Remove and degrease first. Take off doors and hardware, wash everything, and let it dry completely before any paper touches the surface.
2. Scuff the flats. With 220-grit on a block, sand every flat face with light, even pressure, following the grain. You want a dull, uniform surface, not a stripped one.
3. Work the profiles. Use a sanding sponge on recessed panels, grooves, and corners, folding it into the shape so you abrade without digging in.
4. Feather the edges. Lightly sand the edges and the back of each door — these are the surfaces that rub and chip, and they are easy to skip.
5. Remove the dust. Wipe every surface with a tack cloth or damp microfiber and let it dry. Dust left behind becomes a weak bond line and a rough finish.
6. Sand the primer, then between coats. Once the primer dries, knock it down with 320-grit and wipe clean, and repeat a light 320-grit pass between topcoats.

Quality checks

Run your hand over the surface — it should feel uniformly dull and smooth, with no glossy patches. Hold the door under raking light and look for shiny islands, which are unsanded spots that will not hold paint. If you see raw substrate through the finish, you have sanded through a veneer or laminate; stop there and plan to prime that spot well rather than sanding further.

Common mistakes

Using too coarse a grit, like 80-grit, leaves deep scratches that telegraph through the topcoat. Stay at 220 for scuffing and 320 for between-coat smoothing.

Cleanup

Sanding dust travels, so contain it. Drop cloths under the work area and a damp wipe of nearby surfaces keeps dust from drifting into the wet paint later. Shake out or rinse the sanding sponge, and bag used paper. When you are done, wipe the work area and let it settle before you open the primer, because airborne dust will land in the fresh film.

Next project step

With the surface scuffed and clean, the next step is primer — the layer that actually bonds to the dulled finish. See our best primer for cabinets guide to choose one, then continue with the full sequence in how to paint kitchen cabinets. If you want a smoother film, our no brush marks guide picks up from here.

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