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White film on metal roof

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Pete from Australia,

Our most common roofs these days are Colorbond, a product made by BHP. They are corrugated metal that doesn't rust.

They oxidise after time and are best pressure cleaned using a decent surface cleaner.

It's the nature of the product. BHP recommend using 2% SH but that does very little, the easiest way we have found to remove it and make it new again is pressure.

I would love if somebody can recommend a product that remove heavy oxidation.




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