Do I Need to Sand Aluminium Windows Before Painting? | Gold Coast

If you’re planning to repaint aluminium windows, you might be wondering: “Do I really need to sand them first?” The short answer is yes. Skipping sanding is the fastest way to end up with peeling paint and wasted time.


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Why Sanding Aluminium Is Essential

Aluminium frames are smooth and often powder-coated. Paint won’t bond properly to a glossy, sealed surface. Sanding:

Breaks the glaze of powder coating or anodising.

Creates microscopic scratches that primers can grip to.

Levels out imperfections like chips, dents, or old paint.

Ensures even adhesion so the finish doesn’t flake.


Without sanding, even the best primer and paint will peel or chip.


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What Happens If You Skip Sanding

Poor adhesion → paint lifts within months.

Patchy finish → glossy spots where primer didn’t stick.

Costly redo → you’ll have to sand everything later anyway.


It’s not a step you can cheat.


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How Professionals Sand Aluminium Windows

At RepaintPro, every aluminium frame is sanded before priming:

1. Degrease and clean to remove oils and silicone.


2. Mechanical sanding with fine abrasives (not coarse that gouge).


3. Scuff pads for corners, edges, and detailed profiles.


4. Dust removal with vacuum and tack cloths.



This creates a perfectly prepared surface ready for priming and spraying.


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FAQs – Sanding Aluminium Windows

Q: Can I just clean aluminium and skip sanding?
No. Cleaning removes contaminants, but sanding creates the adhesion surface.

Q: Do all aluminium frames need sanding?
Yes. Whether powder-coated, anodised, or previously painted, sanding is always required.

Q: What grit do you use for sanding?
We typically use fine grades around P320–P400 for aluminium. Enough to break the glaze without gouging.

Q: Is sanding messy?
It creates dust, but we always vacuum and wipe down before painting.


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The Bottom Line

Yes — you must sand aluminium windows before painting. It’s the foundation of a long-lasting, factory-quality finish.

At RepaintPro, we handle all the preparation so your aluminium frames not only look brand new but also stay that way for years.

???? Call Steve today on 0403 311 125 for a professional quote on aluminium window painting across the Gold Coast.


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