Spray this mixture onto the roof and agitate it with a soft bristled brush to get it clean.
How to remove oxidation from metal roof.
5 parts water 1 part diluted hydrochloric acid or citric acid or muriatic acid or oxalic acid or vinegar.
If possible sandblast your roof.
First the chalk and oxidation need to be scrubbed off.
Metal roofing oxidation removal sandblasting.
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.
The results will most likely satisfy you.
To remove severe rust stains.
Remove the particles or pieces that are causing the rust stains.
Abrasive pads that will remove the chalk but will not scratch the paint are included with the kits below.
Pine sap decaying leaves and even road dirt that s drifted into the air can settle on your metal roof and stain it.
Most of these substances can be removed by a mixture of cup tri sodium phosphate and 1 gallon of water.