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Why kitchen cupboards are the hardest paint job in the house

Cupboard doors live a harder life than almost any other painted surface in a home. They face steam from the kettle and hob, airborne grease from frying, and constant handling around the knobs and edges. A standard emulsion that looks lovely on a bedroom wall will fail here within months — it stays soft, marks easily and wipes straight off when you try to clean it.

The good news is that a proper paint system, applied in the right order, gives you a finish that is genuinely washable and can last for years. The secret is not really in the paint. It is in the preparation you do before the tin is even opened.

Step one: degrease far more thoroughly than you think necessary

Grease is the single biggest reason cupboard repaints fail. It is invisible once dry, and no primer or topcoat will grip a film of cooking oil. Even a kitchen that looks spotless will have a thin layer on the doors, particularly around handles, along the bottom edges and on any unit near the hob.

• Mix a generous solution of sugar soap and warm water, following the pack instructions.
• Wipe every surface with a microfibre cloth, working top to bottom so drips do not run over clean areas.
• Change the water often — dirty water simply moves grease around.
• Rinse with clean warm water and allow to dry completely.
• For stubborn patches, dab undiluted methylated spirits onto a cloth and wipe, then rinse again.

Do not skip the rinsing stage. Sugar soap leaves a residue that can interfere with adhesion just as badly as grease does.

Sand lightly, repair properly and label everything

Once the doors are clean and dry, give them a light key. You are not trying to remove the old finish, only to create a surface the primer can bite into. A fine abrasive pad or 240-grit paper used with a sanding block is usually enough for melamine, vinyl-wrapped or previously painted doors. Work with the grain on timber and keep the pressure light around edges, where it is easy to sand through.

• Fill chips and dents with a two-part or solvent-based filler, then sand flush once cured.
• Remove doors and drawers and lay them flat on a workbench or dust sheet — gravity is your friend here.
• Bag up hinges and screws and label each door with a small piece of masking tape so it goes back in the same place.
• Mask any glass panels, and wipe everything down with a tack cloth to remove dust.

Choose a paint system built for kitchens

Think of it as three parts: an adhesion primer, then two coats of a durable topcoat. A bonding primer is essential on glossy or laminate surfaces, where ordinary undercoat will scratch off with a fingernail. On bare MDF or timber that has already been painted, a conventional undercoat will normally do the job.

For the topcoat, look for a water-based acrylic eggshell or a paint sold specifically for kitchen units. Eggshell and satin finishes are the sensible middle ground: hard-wearing enough for daily wiping, but with enough sheen to be scrubbable and little enough to hide small imperfections in the doors. Water-based products dry quickly, smell far less and do not yellow the way traditional oil-based paints can in a steamy kitchen.

Apply thin coats and let them cure

With doors laid flat, use a small foam roller for the flat panels and a good synthetic brush for mouldings, edges and recesses. Roll in one direction and finish with light strokes, known as laying off, to smooth out roller texture. Thin coats always beat thick ones — a heavy coat will sag, stay soft underneath and take far longer to harden.

• Allow the primer to dry fully, then sand lightly with 320-grit paper and wipe off the dust.
• Apply two topcoats, following the recoat times on the tin — often four to six hours for water-based paints.
• Sand lightly between topcoats and remove all dust before the next one.
• Work in a room between roughly 15°C and 25°C, with the window open for ventilation.

Leave the doors a full five to seven days before refitting them if you can. Water-based paint feels dry in hours but only reaches full hardness after several days.

Refit, adjust and look after the finish

Once cured, refit the doors and adjust the hinges so the gaps are even. Add a small self-adhesive bumper pad behind each door to stop it banging against the carcass. Clean the new finish with warm soapy water and a soft cloth rather than cream cleaners or abrasive pads, which will dull the sheen over time. Keep a small jar of leftover paint for touching up chips around handles, where wear shows first. Looked after this way, a well-prepped set of kitchen cupboards should stay sharp for years rather than months.