How to prep kitchen cabinets properly — why degreasing beats sanding, keying instead of stripping, and the cure time that decides whether your doors chip in a month.
Painting kitchen cabinets is the highest-impact DIY project in a house. It is also the one people most often have to redo, and the reason is almost never the paint.
It is grease.
Kitchen cabinets carry an invisible film of cooking oil, aerosolised fat and hand grease — heaviest near the cooker, but present everywhere. Sand a greasy door and you do not remove that film. You grind it into the grain, seal it under primer, and your paint sits on a layer of oil. It looks perfect for a month, then chips at the first knock.
Here is the honest hierarchy for this job: degreasing matters more than sanding, and sanding matters more than which paint you buy. Get that order right and the rest is straightforward. ✅
Alt text: “Kitchen cabinet door laid flat, half degreased and sanded dull and half still glossy”
- Why grease beats every other factor
- What are your cabinets made of?
- Key, do not strip
- Setting up without losing your kitchen
- Step by step, start to finish
- The right grits
- Deglosser vs sanding
- Primer and paint choice
- Cure time — the step everyone rushes
- Common mistakes (and how to fix them)
- Pro tips worth knowing
- What I recommend
- Frequently asked questions
- Your final checklist
Why Grease Beats Every Other Factor
Every time someone posts “my cabinet paint is peeling”, the replies argue about paint brands. The actual cause is usually contamination.
Cooking releases fine oil droplets into the air. They settle on every surface in the room, build up over years, and mix with hand oils around handles. The film is invisible and it does not feel greasy to a casual touch — but it is there, especially:
- Above and beside the cooker, where it is heaviest by a wide margin.
- Around every handle, from hands.
- On the underside of wall units, where rising vapour collects.
- Inside the door edges, which people rarely think to clean.
Why sanding does not fix it: abrasive drags the oil across and into the surface rather than lifting it off. You end up with grease pressed into the grain and into your sandpaper — which then spreads it to the next area you touch.
Sanding a greasy cabinet does not remove the grease. It gives the grease somewhere deeper to hide.
The fix is simple: degrease thoroughly before any abrasive touches the door, then degrease again after sanding to remove what the process brought to the surface. Two rounds. It sounds excessive and it is the single highest-value thing in this guide.
What Are Your Cabinets Made Of?
This decides how much you can sand and which primer you need. Check a door edge and the inside of a cabinet.
| Material | How to spot it | Sanding | Primer |
|---|---|---|---|
| Solid timber | Grain runs through the edge | ✅ Forgiving | Standard or stain-blocking |
| Veneered MDF/ply | Thin face layer visible at edge | ⚠️ Light only | Standard |
| Painted MDF | Smooth, no grain, dense edge | Light key only | Standard |
| Laminate / melamine | ⚠️ Plastic sheen, no grain, seam at edge | ⚠️ Scuff only | ✅ Bonding primer essential |
| Thermofoil / vinyl wrap | Wrapped edges, may be peeling | ⚠️ Very light | ✅ Bonding primer |
The one to identify carefully is laminate. It is not wood, it is a plastic surface, and ordinary primer will not stick to it reliably. It needs a dedicated bonding primer — our guide to sanding laminate furniture covers that in detail.
Thermofoil is a vinyl film heat-wrapped over MDF. If it is lifting at the edges, painting will not fix that, and heat from cooking often makes it worse. Consider replacing those doors rather than painting them.
Key, Do Not Strip
Here is the good news that saves you a week: you almost never need to sand cabinets back to bare wood.
If the existing finish is sound — not flaking, bubbling or peeling — your job is to key it. That means scuffing the surface so the new paint has microscopic scratches to grip into. You are dulling a shine, not removing a coating.
What keying looks like when it is done right: the whole door is uniformly matt. No glossy patches anywhere, including in the profile of the mouldings, along the edges, and where the handle was.
When you do need to go further:
- Chips and flaking — sand those areas back at 120 and feather the edges so there is no ridge, then key the whole door.
- Heavy damage or many failing layers — strip those doors properly. See removing paint from wood.
- Deep grain you want to hide — oak cabinets have open grain that shows through paint. If you want a smooth modern look, that needs grain filler, which is a separate and substantial job.
Setting Up Without Losing Your Kitchen
This is a project you live through, so plan it.
- Take the doors and drawer fronts off. Working flat is faster, reaches every edge, and lets paint self-level instead of running. See sanding a door for why horizontal matters.
- Label everything. Numbered masking tape inside each door and in the matching cabinet. Cabinet doors are not interchangeable, and hinge positions vary by millimetres.
- Bag the hardware per door, labelled with the same number.
- Set up a work area away from the kitchen — a garage, a spare room, or outdoors under cover. Sanding dust in a kitchen ends up in food.
- Keep the boxes usable. You will paint the frames in place, so plan to do those in one or two sessions rather than emptying the whole kitchen.
- Budget the time honestly. A typical kitchen is a full week of elapsed time once cure periods are included, even if the active work is only a couple of days.
Step by Step, Start to Finish
Step 1 — Empty and photograph
Clear the cabinets. Photograph the kitchen and each run of doors before anything comes off.
Step 2 — Remove doors, drawer fronts and hardware
Label as you go. Unscrew hinges from the cabinet side where possible so alignment is preserved.
Step 3 — Degrease everything, thoroughly
Doors, drawer fronts, frames, and the inside edges. Work in small sections, change your cloth constantly, and pay particular attention around the cooker and handles. Rinse if the product requires it, and let everything dry.
Step 4 — Water-drop test
Flick water onto a few doors. Beading means clean again. Spreading means you are ready.
Step 5 — Repair damage
Fill chips, dents and old handle holes if you are changing hardware. Slightly overfill, let it cure fully, then sand flush at 120 and feather the edges.
Step 6 — Key the whole surface at 180
Use a random orbital sander on flat panels and wide rails, a sanding sponge in the mouldings and profiles, and folded paper in the corners. Every square inch must end up matt.
Step 7 — Do the frames in place
Same treatment. Mask adjacent walls, worktops and appliances first. The frames get handled constantly, so do not skip the keying here.
Step 8 — Degrease again
Sanding brings embedded grease to the surface and spreads it. A second clean removes it along with the dust.
Step 9 — Vacuum and tack
Vacuum every door and profile, then wipe. Let airborne dust settle before you open a tin.
Step 10 — Prime
Adhesion primer on everything, including the door edges. Two thin coats beat one thick one.
Step 11 — Sand the primer at 220
A light pass. This is what makes the topcoat feel smooth rather than slightly rough, and it takes minutes.
Step 12 — Two thin topcoats
With a light 320 pass between them. Use a hard-wearing cabinet or trim paint, not standard wall paint.
Step 13 — Let it cure before rehanging
This is the step that decides everything. See the cure section below.
The Right Grits
| Stage | Grit | Goal | Notes |
|---|---|---|---|
| Sanding back chips and damage | 120 | Remove failing paint, feather edges | Spot work only |
| Levelling filler | 120 → 180 | Flush and blended | Feather in a wide oval |
| Keying the whole door | 180 | Uniform matt, no gloss anywhere | ✅ The main step |
| Laminate or thermofoil | 220 | Light scuff only | ⚠️ Do not cut through the surface |
| After primer | 220 | Smooth base for topcoat | Light pressure |
| Between topcoats | 320 | Remove dust nibs | See between-coats guide |
| Coarser than 120 | Avoid | — | ❌ Scratches show through paint |
180 is the number. Coarser leaves scratches that telegraph through the finish; finer gives the paint less to grip. Our grit chart explains the reasoning.
Deglosser vs Sanding
Liquid deglosser — sometimes sold as liquid sandpaper — chemically softens and dulls a glossy finish so paint can bond, without abrasive.
| Factor | Deglosser | Sanding |
|---|---|---|
| Reaches carved profiles | ✅ Perfectly | ⚠️ Needs sponges and patience |
| Dust created | ✅ None | ⚠️ Plenty |
| Also degreases | ✅ Usually yes | ❌ No — it spreads grease |
| Levels damage | ❌ No | ✅ Yes |
| Removes drips and texture | ❌ No | ✅ Yes |
| Speed on many doors | ✅ Fast | Slower |
| Works on laminate | Helps, but still needs bonding primer | Scuff only |
The honest answer: use both. Deglosser handles the profiles, mouldings and awkward corners where sanding is slow and imperfect, and it cleans as it goes. Sanding handles the flat areas and anything that needs levelling.
Many decorators degloss everything first — which doubles as the degreasing step — then sand the flat panels at 180. That combination is faster than sanding alone and cleaner than deglossing alone.
Primer and Paint Choice
Primer
Use an adhesion or bonding primer, not general-purpose wall primer. Cabinets are handled constantly and wiped with cleaning products, so the bond matters far more than on a wall.
- Timber and MDF — a good bonding primer, or shellac-based if you have knots or tannin bleeding through.
- Laminate, melamine or thermofoil — a dedicated bonding primer is essential, not optional.
- Dark colours or stained wood — a stain-blocking primer stops bleed-through.
Paint
Use a paint made for cabinets, trim or doors. These cure harder than wall paint, which stays comparatively soft and marks easily. Wall emulsion on cabinets will not survive a kitchen.
Satin and semi-gloss are the usual choices — they wipe clean and hide fingerprints better than matt, which is difficult to clean without burnishing.
Application
A small foam or microfibre roller on flats plus a good brush for profiles gives a very acceptable finish. Spraying gives the best result but needs serious masking and practice. Whatever you use, thin coats — thick cabinet paint stays soft for weeks and dents at the first knock.
Cure Time — the Step Everyone Rushes
This is the second biggest cause of failed cabinet projects after grease, and it is entirely about patience.
Dry and cured are different things. Cabinet paint is touch-dry in a few hours and can be recoated the same day. But full cure — where the film reaches its final hardness — commonly takes two to three weeks, and longer in cold or humid conditions.
During that window the paint is soft. Which means:
- Rehanging too early lets the door edge stick to the frame, and opening it pulls the paint off in strips.
- Closing drawers hard dents the front.
- Putting contents back and knocking the inside edges leaves permanent marks.
- Cleaning products can soften an uncured film.
The practical compromise: rehang doors after a few days so you can use the kitchen, but treat them gently — open by the handle, close slowly, and put felt bumpers on the corners. Avoid heavy cleaning for the full cure period. And if you can leave doors off longer, do.
Common Mistakes (and How to Fix Them)
Mistake 1 — Not degreasing, or degreasing once
What happens: paint peels in sheets within months.
The fix: degrease before sanding and again after. Use the water-drop test to confirm.
Mistake 2 — Leaving glossy patches
What happens: paint grips the matt areas and lifts from the shiny ones.
The fix: check under raking light. Any gloss in a moulding or along an edge needs another pass.
Mistake 3 — Painting laminate with ordinary primer
What happens: the paint scratches off with a fingernail.
The fix: identify laminate first and use a bonding primer.
Mistake 4 — Sanding around hardware instead of removing it
What happens: an untouched glossy ring that fails first.
The fix: take handles and hinges off, and bag them by door.
Mistake 5 — Thick coats to save time
What happens: the paint stays soft for weeks and dents easily.
The fix: two or three thin coats with light sanding between.
Mistake 6 — Using wall paint
What happens: it never hardens enough for a kitchen and marks constantly.
The fix: use cabinet, trim or door paint.
Mistake 7 — Rehanging before cure
What happens: doors stick to frames and the paint tears when opened.
The fix: wait as long as you can, then treat them gently for the full cure period.
Mistake 8 — Skipping the door edges
What happens: bare edges absorb kitchen moisture and the paint lifts from the sides inward.
The fix: prime and paint all four edges while the door is flat.
Pro Tips Worth Knowing
Do the boxes first, doors second
Frames are the awkward part. Getting them done while you still have energy means the satisfying flat work comes as a reward.
Paint the backs of the doors first
Any small imperfections from the drying rack end up on the side nobody looks at.
Use door painting stands or screws as feet
Drive screws part-way into the hinge holes so the door sits raised, letting you paint front, back and edges without waiting.
Keep a wet edge on long rails
Work the full length of a rail in one pass rather than stopping mid-way, which leaves a visible lap mark.
Change your degreasing cloth constantly
A saturated cloth just moves grease around. Fresh cloth, small area, repeat.
Do one test door completely
Take one door all the way through degrease, key, prime and paint before committing to twenty. You learn the timings and catch problems while they are cheap.
What I Recommend
Given that grease is the main cause of failure, the highest-value product for this job is not an abrasive.
CHOMP! Paint Prep Cleaner and Deglosser
Best Cabinet Prep Buy★★★★☆ 4.2 out of 5 on Amazon
This does the two jobs that actually decide whether cabinet paint lasts: it cleans off grease and it dulls the gloss so paint can grip. On a kitchen, those are the two failure points, and doing both in one pass is genuinely efficient.
Its real advantage over sanding alone is reach. It gets into carved profiles, mouldings and corners where a sanding sponge is slow and a machine cannot go — exactly the places people leave glossy and where paint later lifts. Most decorators use it on the detail and sand the flat panels, which is faster and more thorough than either method on its own.
Why it works:
- ✅ Tackles grease, which is the number one cause of cabinet paint failure
- ✅ Reaches mouldings and profiles that sanding leaves glossy
- ✅ No dust — a real advantage when you are working in or near a kitchen
- ✅ Much faster than sanding across twenty doors of detail
- ✅ Useful beyond cabinets on trim, doors and banisters
- ⚠️ It does not level anything. Chips, drips and damage still need sanding at 120
- ⚠️ Ventilate and follow the label. Check dwell time and whether it needs rinsing
- ⚠️ Not enough on its own for laminate — you still need a bonding primer
Best for: kitchen and bathroom cabinets, panelled doors, trim and banisters — anywhere greasy, glossy or too detailed to sand properly.
Not for: levelling damage, removing failing paint, or replacing a bonding primer on laminate surfaces.
🛒 Check Price on AmazonPrice and availability change often — the button shows the live Amazon price.
Frequently Asked Questions
Do I have to sand kitchen cabinets before painting?
You have to key them — scuff the surface so paint can grip — but you almost never need to sand back to bare wood. A pass at 180 grit until the whole surface is uniformly matt is enough for sound existing finish. On heavily moulded doors, a liquid deglosser reaches the profiles better than sanding does. What you cannot skip is degreasing, which matters more than the sanding itself.
Why does cabinet paint chip and peel?
Three causes, in order of likelihood. Grease — kitchen cabinets carry an invisible film of cooking oil, and sanding grinds it in rather than removing it. Shiny patches left behind, usually in mouldings and around handles, where paint has nothing to grip. And rehanging before the paint has cured, which takes two to three weeks even though it feels dry in hours. Fix those three and cabinet paint lasts years.
What grit sandpaper for kitchen cabinets?
180 grit for keying the whole surface — that is the main number. Use 120 only for spot-sanding chips and levelling filler, feathering the edges so no ridge shows. After priming, a light 220 pass gives a much smoother topcoat, and 320 between topcoats removes dust nibs. Avoid anything coarser than 120, since those scratches telegraph through the finished paint.
Can I paint laminate or melamine cabinets?
Yes, but they need different preparation. Laminate is a plastic surface, not wood, so ordinary primer will not bond reliably — you need a dedicated bonding primer. Scuff lightly at 220 rather than sanding properly, because cutting through the laminate layer exposes the particleboard underneath. Clean thoroughly first. Our guide to sanding laminate furniture covers the full process.
How long before I can use the kitchen again?
You can rehang doors and use the kitchen within a few days, but the paint will not be fully cured for two to three weeks. During that window treat everything gently: open doors by the handle, close drawers slowly, avoid harsh cleaning products, and add felt bumpers so doors do not stick to the frames. Rushing this is why doors that looked perfect end up chipped along the closing edge.
Will the wood grain still show after painting?
On open-grained timber like oak, yes — the grain texture telegraphs through paint no matter how many coats you apply. Many people like that look. If you want the flat, sprayed appearance of modern MDF doors, you need to fill the grain with a grain filler before priming, which is a substantial extra stage. Decide which you want before you start, because it changes the whole plan.
Your Final Checklist
- Kitchen photographed before anything came off
- Cabinet material identified — timber, MDF, laminate or thermofoil
- Doors and drawer fronts removed and numbered on the hinge edge
- Hardware bagged and labelled per door
- Everything degreased thoroughly, cloths changed constantly
- Water-drop test passed — drops spread, not bead
- Chips and damage sanded at 120 and feathered
- Handle holes filled if changing hardware
- Whole surface keyed at 180 — uniformly matt
- Mouldings and profiles done with sponge or deglosser
- Frames keyed in place, adjacent surfaces masked
- Degreased a second time after sanding
- Vacuumed and tacked, dust allowed to settle
- Adhesion primer applied, bonding primer if laminate
- All four door edges primed and painted
- Primer sanded lightly at 220
- Cabinet or trim paint used, never wall paint
- Two or three thin topcoats with a light 320 pass between
- Full cure time respected before heavy use
- Felt bumpers fitted so doors do not stick to frames
Related reading: sanding wood before painting, how to sand a door, and sanding sealer vs primer.