Why does painted or anodised aluminium, like window frames, price lower than bare aluminium?
Short answer: Painted and anodised coatings are a surface treatment that has to be removed before the underlying aluminium can be cleanly reprocessed, adding a processing step and some material loss that bare, uncoated aluminium doesn't require — this extra handling cost is why coated aluminium generally trades at a discount to clean bare metal, even though the aluminium content itself is often just as good quality.
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List Free →Why the coating matters to a processor
Paint and anodised (electrochemically formed) finishes need to be removed — typically through mechanical or thermal processing — before the aluminium underneath can go back into high-quality applications, and this extra step costs money and time.
It’s not about the aluminium quality itself
The base aluminium alloy in a painted or anodised window frame is often perfectly good — the discount reflects the processing needed to get to that clean metal, not a judgment on the underlying material.
What this means practically
Don’t be surprised by a lower quote on coated material compared to what you might expect for “clean aluminium” — ask the buyer specifically how they price coated versus bare material so you understand the difference.
How ScrapTrade Makes This Easier
ScrapTrade’s listings let you describe your material’s finish honestly, so buyers quote accurately instead of assuming the worst-case processing scenario.
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