Muriatic acid is available at your local hardware store.
Muriatic acid on aluminum siding.
Muriatic acid otherwise known as hydrochloric acid is a common choice for an acid wash.
You can reduce hydrochloric acid s effects through dilution.
Using muriatic acid step 1 put on goggles and rubber gloves to protect yourself from the corrosive effects of muriatic acid.
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It is also toxic to the environment.
It is reasonably safe for the aluminum and fairly easy to come by.
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In most cases you need to scrub the surface with a chemical cleaner.
Keep in mind that this acid is very dangerous and should be kept away from pets and children.
If the paint on the siding above masonry is chalking it washes down onto the masonry and stains the surface.
Pour the muriatic acid directly on the aluminum surface and watch for the acid to start removing the top layers from the aluminum.
Place the aluminum item in your kitchen sink if it s small enough to fit without any splashing or a large metal tub for bigger items.
For efflorescence and other stubborn stains mix 1 cup of 10 percent muriatic acid in 1 gallon of water.