Aluminum patio furniture is a popular choice for Canadian climates because it doesn't rust — but it does oxidize, developing a chalky white or grey film over time, and powder-coated finishes can fade and chalk. Regular cleaning and occasional protective treatment keeps aluminum furniture looking newer for longer.
Standard Clean (Powder-Coated Aluminum)
Most outdoor aluminum furniture has a powder-coat finish — a baked-on paint that is durable but not impervious:
- Rinse with a garden hose to remove loose dirt and dust
- Mix warm water with a few drops of dish soap in a bucket
- Scrub with a soft brush or cloth — avoid abrasive scrubbers that scratch the powder coat
- Pay attention to joints, welds, and underneath armrests where dirt accumulates
- Rinse thoroughly and allow to air dry or wipe dry with a cloth
Removing Oxidation (Bare/Bare-Finish Aluminum)
Aluminum oxidizes over time, producing a chalky, dull surface that doesn't respond to soap and water:
- Apply a paste of cream of tartar and a little water to the oxidized areas
- Rub with a soft cloth in circular motions
- Rinse thoroughly
- Alternatively, use a commercially available aluminum brightener or white vinegar on a cloth to cut through the oxidized layer
Protecting After Cleaning
- For bare aluminum: apply a thin coat of car wax or aluminum sealant after cleaning — it creates a barrier that slows future oxidation and makes the next clean easier
- For powder-coated aluminum: apply automotive paste wax once a year to restore some sheen to faded finishes and protect against UV fading
Winter Storage (Toronto)
- Clean thoroughly before storing — salt, bird droppings, and pollen left on the surface over winter accelerate oxidation and staining
- Store indoors if possible, or cover with a fitted furniture cover to protect against freeze-thaw moisture damage
- Stack chairs seat-to-seat and secure with a strap to prevent movement in wind