For the most.
How to remove oxidation from metal roof.
Once the chalk is removed and the metal roof looks good when it is clean and wet then 2 coats of everbrite are applied to restore the color and luster of the roof.
Pine sap decaying leaves and even road dirt that s drifted into the air can settle on your metal roof and stain it.
First the chalk and oxidation need to be scrubbed off.
Remove the particles or pieces that are causing the rust stains.
To remove severe rust stains.
If possible sandblast your roof.
5 parts water 1 part diluted hydrochloric acid or citric acid or muriatic acid or oxalic acid or vinegar.
The results will most likely satisfy you.
Modern chemical treatments provide a relatively safe method to use both for you and the environment.
Metal roofing oxidation removal sandblasting.
Use a rag to apply to affected spots and use circular wiping motions.