You can restore shine to galvanized metal by removing the build up that causes.
Using vinegar to de shine metal roof tin.
Zinc is quite reactive and will react with almost any acid.
Metal roofs are relatively easy to clean with patience.
Saltwater would do a little dulling but maybe not fast enough for you.
In general most people use corrugated metal as actual roofing so they want it to be weather resistant.
In most cases all you need is pressurized water but sometimes you may need a chemical cleaner for especially tough spots.
Tin panels that are shiny they are actually steel not tin can be dulled with just about any weak acid.
All metals metal can t shine if it s covered in rust.
The acidic vinegar lightly etches the metal surface so the piece will rust faster.
To clean any metal making it shine make a paste of white vinegar and cream of tarter.
The surface of galvanized metal is usually shiny but over time the shine can become milky or cloudy.
Spray the roof with the diluted substance and let it sit for about an hour.
Never mix chemicals together.
Vinegar would be a cheap source.
So you ve prepped the metal object for rusting but how does the oxidation process actually happen.
How to clean a metal roof.
Pour some white vinegar into the spray bottle and then spray every inch of the metal object.
Galvanizing metal is the process of dipping it in a solution of molten zinc.
Spray your metal object with plain white vinegar soaking the surface and letting it dry before reapplying.
To remove rust from metals soak the items in non diluted white vinegar.
You could pour some of the vinegar into a spray bottle and spray your metal objects instead.
Vinegar bleach ammonia and salt will all effectively change the ph level of your roof allowing you to clean it.
Since we are trying to do the opposite and speed up the aging process we want to weaken the protective coating as much as possible.
Use only one of these substances mixed with water at a time.
For this specific horseshoe i let it sit in the vinegar for about 5 minutes before i emptied the vinegar from the container.
Spray white vinegar onto the metal and wait several minutes.
Donning gloves and goggles to protect yourself from splashes pour white vinegar into a plastic spray bottle then generously.
Now your steel will be ready for the main event.
To help with this there is a protective coating on the metal to prevent aging.
With a little elbow grease and a bottle of white vinegar you can make any metal shine.
Let your metal objects sit in the vinegar for as little or as long as you want then drain the vinegar from the container.
Let it dry in the sun and then repeat several more times.
First you ll need to create a rusting solution by combining 16oz hydrogen peroxide 2oz white vinegar and tablespoon of salt.