The preparation stage is where a kitchen respray is genuinely won or lost. A professional spray painter spends more time preparing a kitchen than actually spraying it. This is not an accident: the preparation determines whether the finish bonds correctly, lasts a decade and looks factory-quality, or starts failing within the first couple of years.
- Degreasing is the single most important step, removing grease, silicone and wax that prevent primer from bonding
- Adhesion primer must be applied before any colour coat, every time, without exception
- Laser stripping is sometimes needed to remove old paint or lifting vinyl wrap before respraying
- Surface damage is filled and sanded flush during preparation, not masked by the topcoat
- The whole preparation process typically takes 4 to 8 hours for a medium kitchen
Why Does Preparation Matter So Much?
Kitchen cabinets accumulate years of cooking grease, silicone from sealants and wax from cleaning products. These residues are invisible to the eye but they are lethal to paint adhesion. A spray topcoat applied over any of these contaminants will fail, not immediately, but within 12 to 24 months the finish will start lifting at the edges, peeling in sheets or chipping with the lightest contact. When we see a poor respray job brought to us for repair, inadequate degreasing is the cause in the vast majority of cases.
The analogy is simple: preparation is the foundation. The most expensive paint in the world will not hold on a poorly prepared surface. An average paint applied correctly to a properly prepared surface will outlast expensive paint applied over contamination every single time.
Step 1: Door Removal
The first physical step is removing all doors and drawer fronts from the kitchen. Every door is numbered or labelled to ensure it is returned to exactly the correct position. Handles, hinges and any fixings that will not be sprayed are also removed at this stage. Leaving hardware in place and masking around it produces an inferior result at the edges and makes subsequent cleaning and maintenance harder.
Removing doors also allows the door frames, carcass edges and any painted interior faces to be properly cleaned and treated. These are the surfaces most people forget about but they are visible every time a cabinet is opened.
Step 2: Degreasing
With doors removed, every surface to be sprayed is thoroughly cleaned with a specialist degreasing product. This is not washing-up liquid or a general kitchen spray. Professional degreasers are formulated to cut through baked-on cooking grease, silicone from door-seal products and wax residue from furniture polishes and sprays. The cleaning is done methodically, section by section, and repeated if any contamination remains.
This step takes longer than most homeowners expect. On a busy family kitchen that has been cooking daily for ten years, thorough degreasing can take an hour or more on its own. Rushing it is the most common shortcut taken by less experienced operators and it is the most costly one in terms of long-term finish quality.
Step 3: Sanding
Once degreased and dry, every surface is sanded to create a mechanical key for the primer. Sanding opens up the surface at a microscopic level and gives the primer something to physically grip onto. The grit used depends on the substrate: a smoother MDF surface requires a finer grit than a rougher wood-grain surface. Sanding also levels any minor imperfections and starts the process of smoothing existing texture out of the surface.
After sanding, all sanding dust is removed with a tack cloth before any product is applied. Sanding dust left on the surface will be trapped in the primer and create a gritty texture in the finished topcoat.
Step 4: Filling Surface Damage
Any chips, dents or damage to the door surfaces are filled at this stage with an appropriate wood filler or surface filler, allowed to cure fully and then sanded flush. The goal is a smooth, even surface with no visible imperfections before primer is applied. Filling is done after initial sanding so that the filled areas can be blended seamlessly into the surrounding surface.
It is worth noting that spray painting cannot hide significant structural damage to doors. Deep gouges, delaminating surfaces or doors that are swelling due to water ingress need to be addressed before any cosmetic treatment. A professional operator will identify and discuss any such issues during the initial survey.
Step 5: Adhesion Primer
Adhesion primer is the layer that chemically and mechanically bonds the topcoat system to the prepared substrate. It is not optional and there is no professional kitchen respray that does not include it. The primer seals the surface, prevents bleed-through from the substrate and creates a uniform base for the colour coat.
Some substrates, particularly certain laminates and thermofoil surfaces, require specialist adhesion primers with different chemical properties to those used on wood and MDF. Using the wrong primer for a substrate is as damaging as using no primer at all. This is one of the reasons why the material of the existing doors matters and why it should be assessed during the pre-job survey.
After primer is applied and cured, the surface is inspected and lightly sanded again to remove any dust nibs or imperfections before the colour topcoat is applied.
When Is Laser Stripping Needed?
Some doors need more than standard preparation before they can be successfully resprayed. The two most common situations are: doors that have been previously brush-painted or roller-painted with a heavy buildup of old paint, and doors with a vinyl wrap that is lifting or peeling at the edges.
In both cases, applying new paint over the existing surface will not produce a lasting result. The old paint or lifting wrap will continue to move and will take the new finish with it. Laser stripping removes the existing surface coating precisely and cleanly using a laser beam, without damaging the door substrate underneath. It produces a better base for the new finish than any mechanical or chemical stripping method.
Laser stripping adds £20 to £40 per door to the project cost depending on the complexity of the existing coating. Not every kitchen needs it, but when it is necessary, it produces a dramatically better and more durable result. We cover laser stripping in detail in our full guide to laser stripping before respraying.
What the Kitchen Carcasses Need
While the doors are being prepared off-site, the kitchen carcasses (the cabinet boxes that stay in place) are cleaned, lightly sanded where needed and any face edges or frames to be sprayed are primed and prepared in situ. Masking is applied to worktops, appliances and floors to protect them during the process. Professional masking is precise and methodical: a good mask protects everything cleanly and comes off without leaving adhesive residue.
Frequently Asked Questions
Preparation determines whether a kitchen respray lasts 10 years or fails within 12 months. Grease, wax and silicone contamination left on the surface prevents primer from bonding properly. A finish that peels prematurely almost always traces back to inadequate degreasing or skipping the adhesion primer stage entirely.
Adhesion primer creates a chemical and mechanical bond between the substrate and the paint system. Without it, even perfectly cleaned and sanded doors will not hold the topcoat reliably over time. Every professional kitchen respray requires at least one coat of adhesion primer before any colour coat is applied. It is not optional and should never be described as such.
Preparation for a medium kitchen of 11 to 20 doors typically takes 4 to 8 hours. This includes door removal, degreasing, sanding, filling, priming and inspection. Larger kitchens with more doors, significant surface damage or doors requiring laser stripping will take longer. Rushing this stage to save time is the most common cause of early finish failure.
It is not advisable. Professional preparation uses specialist degreasers, appropriate primers and the correct sanding techniques for each substrate. Domestic cleaning products do not remove silicone and wax contamination reliably. Incorrect preparation followed by professional spraying still produces an inferior result because the failure point is in the preparation layer, not the topcoat.
Written by the ColourHaus team · 13 May 2026 · More articles