Domakihub Clean Aluminium Window Frames and Beat Oxidation
Remove white chalking and salt deposits from aluminium frames — and keep them gone.
Reviewed by Domakihub cleaning pros · 2026-06-23 · 5 min read
Aluminium window and sliding-door frames are everywhere in Greek properties, from Athenian apartments to Aegean island villas, and they take a beating from salt air, humidity, and UV exposure. The white powdery film that builds up is oxidation — a surface reaction that looks unsightly but is fully reversible with the right approach. The video above shows the process in real time; the steps below walk you through each stage in detail, with notes on the products that work best in coastal and island conditions.
Why Aluminium Frames Oxidise Faster Near the Coast
Aluminium naturally forms a thin oxide layer when exposed to air — that is actually what makes it corrosion-resistant. The problem in coastal Greece is that salt particles carried inland by the meltemi and sea breezes accelerate the reaction dramatically. The result is a chalky, pitted surface that traps further dirt and, if left long enough, becomes porous enough to harbour mould.
Holiday rentals and hotels face the issue year-round because buildings near the shore rarely get a full break from salt exposure. Regular maintenance — ideally twice a year before and after peak season — is far cheaper than frame replacement, which can run to several thousand euros per property.
What You Will Need Before You Start
You do not need specialist products for this job. White vinegar, washing-up liquid, bicarbonate of soda, a soft-bristle brush (an old toothbrush works well for the track grooves), microfibre cloths, and a bucket of warm water cover most situations. For heavy oxidation that has been building for a season or more, a dedicated aluminium brightener or a small amount of cream of tartar paste will cut through the white chalking faster.
Avoid steel wool, abrasive scourers, or bleach-based cleaners. Steel fibres embed in the soft metal and cause new rust spots; bleach attacks the anodised or powder-coated finish and strips the protective layer that slows future oxidation. Wear rubber gloves and work in shade — cleaners dry too fast in direct Greek sun and leave streaks.
Step-by-Step: Cleaning and Protecting Aluminium Frames
- 1
Dry-brush loose dirt and debris first
Before any liquid touches the frame, run a soft dry brush along every track, corner, and drainage hole to dislodge dust, dead insects, and loose salt crust. This prevents grit from scratching the surface when you apply your cleaning solution. Use a vacuum with a narrow nozzle on the lower tracks — coastal frames accumulate surprising amounts of sand and organic debris that will clog your cleaning cloths if left in place.
- 2
Apply a vinegar solution to dissolve oxidation
Mix equal parts white vinegar and warm water in a spray bottle or bowl. Apply generously to the oxidised areas and leave it to dwell for two to three minutes — the mild acidity breaks the bond between the oxide layer and the metal surface. For stubborn white patches, make a paste of bicarbonate of soda and a few drops of washing-up liquid, apply it directly, and let it sit for five minutes before scrubbing. Work in small sections so the solution does not dry on.
- 3
Scrub with a soft brush, then wipe clean
Use a soft-bristle brush or damp microfibre cloth to work the solution into the frame using circular strokes. Switch to an old toothbrush for the recessed tracks and corners where oxidation builds fastest. You will see the chalky residue lift off onto the cloth. Rinse with clean warm water immediately — do not let vinegar sit on the frame longer than ten minutes, especially on anodised finishes, as prolonged contact can dull the surface.
- 4
Tackle remaining stains with a targeted treatment
After the main clean, isolated grey or dark stains — often mineral deposits from hard tap water or algae in shaded areas — will still be visible. A paste of cream of tartar and warm water, left for five minutes then scrubbed off, handles most of these. For oxidation that has started to pit the metal rather than just coat it, a proprietary aluminium restorer (available at most Greek ironmonger shops as 'katharistiko aluminiu') applied with a soft cloth and buffed off will even out the surface. Rinse thoroughly after any chemical treatment.
- 5
Seal with a protective wax or silicone spray
This step is what most people skip, and it is the reason oxidation comes back within weeks. Once the frames are clean and fully dry, apply a thin coat of car wax, clear silicone spray, or a purpose-made aluminium sealant to all exposed surfaces. The wax fills the microscopic pores left by oxidation and creates a barrier against salt and moisture. Buff to a light sheen with a dry microfibre cloth. In coastal locations, repeat this protective step every three to four months — or after any major storm that has blasted the building with salt spray.
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FAQ
- Can I use the same method on powder-coated aluminium frames?
- Yes, with one adjustment: skip the cream of tartar paste and avoid any abrasive scrubbing on powder-coated surfaces, as they have a baked-on colour layer that can be scratched or dulled. Stick to the vinegar solution and a very soft cloth, and use a silicone-based sealant rather than car wax for the protective step, since wax can leave a hazy residue on coloured coatings.
- How often should I clean aluminium frames on a property directly facing the sea?
- At minimum twice a year — once in April before the tourist season and again in October after it closes. Properties within 500 metres of the shoreline, or on exposed island locations that catch the full meltemi, benefit from a light wipe-down with a damp microfibre cloth every four to six weeks to prevent salt deposits hardening into oxidation. It takes under ten minutes per window and saves hours of remedial cleaning later.
- The oxidation has turned into actual pitting — is there still a fix short of replacement?
- Light to moderate pitting can be filled and smoothed with an aluminium filler or two-part epoxy repair paste (available at hardware chains like Praktiker or Leroy Merlin in Greece), sanded flush once cured, then sealed with a matching touch-up paint or clear lacquer. Deep structural pitting that runs through the wall of the frame section compromises weatherproofing and thermal performance, at which point replacing the affected section or the full frame unit is usually the more economical long-term choice.