This solution will discolor wood surfaces and probably many other things so be careful.
How to age galvanized metal siding.
Sprinkle the table salt on the metal while the hydrogen peroxide is wet.
To age galvanized metal start by sanding it with 80 grit sandpaper until it no longer looks shiny and slick.
Grab an old rag make sure it s large enough to drape comfortably over the entire surface of your galvanized victim.
Soak the rag in the patina solution wring it out just a bit and cover your item with the wet rag.
Clorox clinging bleach gel toilet cleaner i tried about 5 brands this worked best and regular old baking soda.
How to age corrugated metal roofing.
With a couple of common household products and a couple of tools you can get all aged up in minutes.
As for chemicals you only need two things.
Place lathered bucket outside or in a well ventilated area for 2 4 hours or until dry.
Well i mean age galvanized metal that is.
Corrugated metal roofing you can find this at any home improvement store clorox toilet cleaner with bleach.
Cover the hydrogen peroxide with a thin coat of salt so it interacts with the hydrogen peroxide.
Then put the metal on a plastic sheet in an open or well ventilated area and put on safety glasses gloves and a long sleeved shirt to protect yourself from the chemicals.
The cleaner acts as stripping agent removing the galvanized finish from the metal.
As you sprinkle the salt you can see it begin to work with the hydrogen peroxide.
The longer it sits the more aged the piece will look.
Old towel or rag.