- Cost Estimate
The cost of repainting window frames spacialy aluminium in Australia depends on size, labour, access, preparation work and paint quality. On average, professional spray-painting usually ranges between AU$250 and AU$600 per window.
For a typical home with 10–15 windows, this brings the total project cost to approximately AU$2,500 to AU$7,500.
Some painting service guides list repainting a window and frame around AU$200–$250, though more complex jobs can be higher.
Prices may also increase if:
The windows are on upper storeys and require special equipment
The existing paint is badly damaged or oxidised
The customer requests premium coatings or extra durability
- Key Steps and Important Considerations
Surface Preparation
Cleaning
Begin by thoroughly cleaning the aluminium frame using warm water and mild detergent or a commercial degreaser. Remove dust, dirt, grease and old loose paint. Allow the surface to dry completely.
Removing Oxidation and Old Coatings
Aluminium oxidises over time and develops a chalky surface. This must be sanded back to allow proper adhesion. Use 180–220 grit sandpaper or sanding sponges to lightly scuff the entire frame. After sanding, wipe the surface with a damp cloth or tack cloth to remove dust.
Masking
Use painter’s tape to carefully mask the glass, surrounding walls and any surfaces that should not be painted. Cover the nearby area with drop sheets or plastic film. Press the tape edges firmly to prevent paint bleed.
Priming
Use a metal or self-etching primer specifically designed for aluminium. This provides a chemical bond between the paint and the metal surface, preventing peeling or early failure. Apply the primer in thin, even coats and allow full drying time before painting.
Applying the Top Coat
Choose a high-quality metal paint such as epoxy or acrylic enamel. Apply several thin coats rather than one thick coat to ensure even coverage and a hard, durable finish. Follow drying times recommended by the manufacturer.
After the final coat has cured, carefully remove masking tape. Any slight overspray on the glass can be removed with a razor blade held flat against the surface.
Final Inspection and Maintenance
Inspect the frames for missed spots, drips or adhesion problems. For exterior frames, consider periodic maintenance checks and minor touch-ups to extend the coating’s life. Avoid stressing the frame until the coating has fully cured, which may take several days.
- Key Things to Keep in Mind
The quality of paint directly affects durability. Premium metal paints cost more but last longer outdoors.
Avoid painting in extreme heat or cold. Moderate conditions produce the best finish.
Use proper protective equipment, including gloves, safety glasses and a respirator, when sanding or applying paint.
Proper masking significantly improves the final appearance.
Allow adequate curing time before using sliding windows, screens or handles.
- Recommended Tools and Materials
Sandpaper (180–220 grit)
Mild detergent or cleaning degreaser
Microfibre or tack cloths
Painter’s tape
Plastic masking sheets or drop cloths
Etch primer or direct-to-metal primer suitable for aluminium
High-quality top-coat metal paint (acrylic enamel, epoxy or similar)
Spray gun or high-quality brushes and rollers
Safety gear (respirator, gloves, goggles)
Razor blade for final glass clean-up
- Common Mistakes to Avoid
Poor preparation, especially skipping sanding and cleaning, which often leads to peeling.
Using standard primer instead of metal primer, which can cause adhesion failure.
Applying paint too thickly, resulting in runs, sagging or uneven finish.
Removing masking before the paint has dried properly.
Not allowing full curing before putting windows back into normal use.
- Why Repainting Is Better Than Replacing
Repainting aluminium window frames is often far more cost-effective than replacement. Spray-painting typically costs a fraction of a full window replacement while delivering a modern, fresh, factory-style finish. It is less disruptive, usually completed over a few days, and significantly improves street appeal. With correct preparation and products, the finish can last many years and withstand Australia’s harsh outdoor conditions.
