How to remove rust from aluminum siding

This blog post will answer the question, “how to remove rust from aluminum siding” and cover topics like how to get rid of rust on aluminum siding, methods of removing rust, and frequently asked questions.

How to remove rust from aluminum siding?

Rust from aluminum siding can be removed by using CLR. Remove any leftover corrosion from the metal siding using CLR. Calcium, Lime, and Rust Remover (CLR) is an acronym for Calcium, Lime, and Corrosion Remover. It’s available at any hardware shop. Using a sponge or the remainder of the Magic Eraser, rub CLR straight into the spot, then rinse with a sprayer.

How to Get Rid of Rust on Aluminum Siding?

Rust is a pervasive stain that spreads fast to adjacent surfaces. Corrosion is most often spread via dripping water or anything that comes into close touch with rusted metal. It’s usual for houses with aluminum siding to have a corrosion spot now and again. They are usually simple to deal with as long as you detect them early and do not allow rust to develop.

Rust from aluminum siding can be removed by following the steps given below:

1st step

  • Using a water hose, rinse the discolored surface of the metal siding. 
  • Spray the surface thoroughly with a high-pressure spray nozzle.
  •  During the first rinse, you may be able to wash away some of the rust.

2nd Step

  • Clean the discolored area of the metal siding with a strong brush and a pail of soapy water. 
  • Massage the siding vigorously and thoroughly to remove as much corrosion as possible. 
  • Aluminum siding is long-lasting, and you won’t have to clean it too hard. 
  • After you’ve done washing the siding, wash the area with the water hose.

3rd step

  • Use a Mr. Clean Magic Eraser to scrape the wall. The Magic Eraser is a multi-purpose cleaner that works well on all surfaces except those that are highly polished. 
  • Wet the Magic Eraser and clean the metal siding with it. After using the Magic Eraser, wash the siding. 
  • By this time, the rust stain should be almost gone. Proceed to the next step if you haven’t already.

4th step

  • Eliminate any leftover corrosion from the metal siding using CLR. 
  • Calcium, Lime, and Rust Remover (CLR) is an acronym for Calcium, Lime, and Corrosion Remover. It’s available at any hardware shop. 
  • Using a sponge or the remainder of the Magic Eraser, massage CLR straight into the spot, then rinse with a hose. 
  • CLR should only be used as a last option since it might dull or even eliminate the paint on your metal siding.
Materials Needed
A Bottle of CLR
Water hose
Mr. Clean Magic Eraser
Soapy Water
Stiff Brush

How to Remove Rust Stains From Aluminum Siding?

If you choose aluminum siding for your home’s exterior, you’ve chosen a rust-resistant component that should last a long time. Aluminum siding, on the other hand, is not impervious to corrosion issues. Corrosion from another metal item may discolor aluminum siding, just as any other material. 

Corrosion spots on metal siding may be a major issue that is tough to eliminate. All is not lost, though, if your metal siding has rust spots. Rust spots on metal siding may be removed with care. What follows should provide you with all of the knowledge you need to do the task yourself.

To remove rust stains from aluminum siding follow the steps given below:

  • Rinsing
  • Washing
  • Use CLR 

I will now elaborate on the guidance given below:


Get out your yard sprayer and spray the rust spots with water before you do anything else. This technique may remove part of the rust blemish perhaps all of it, though this is unlikely—if you apply enough pressure. Even if this does not eliminate even a little amount of the rust spot, it is still a useful step since it prepares you for the following step.


Rust spots on metal siding may be removed effectively with regular dish soap and water. 

Steps of washing: 

  • Fill a bucket halfway with water and a generous quantity of dish soap. 
  • Stir it until it forms a lather, then immerse your brush in the soapy water combination until it is completely filled.
  • Use your brush to clear out the rust spots after it’s nice and moist. 
  • Aluminum siding is highly strong and tough, so you can clean it with your brush really vigorously. 
  • There’s no need to be kind with your aluminum siding’s rust spots, so scrape them as vigorously as you can. 
  • You should rinse the area with your hose every now and again to check your work and to remove any corrosion that has been dislodged from your metal siding. 
  • It’s likely that this method will eliminate all of the rust spots from your metal siding. As a result, it’s critical not to get disheartened and go to the next level too fast. 
  • Soap, water, and scraping can eliminate a lot of rust spots, and they’re referred to as the alternative since they’re gentle and won’t harm the paint.

Use CLR 

If soap, water, and scraping aren’t enough to eliminate the rust spots from your aluminum siding, CLR, or Calcium, Lime, and Corrosion Remover, is another choice. CLR is available at your local hardware shop.

Steps of applying CLR:

  • To begin, put on work gloves to keep your hands safe. 
  • Even if you’re working outdoors, be sure you’re not inhaling the CLR fumes. 
  • Apply CLR on a cloth and use it to cover the rust stain with CLR. 
  • Do not scrub; instead, wait 2 minutes before rinsing with your sprayer.
Materials NeededTools Needed
Dishwashing SoapWork Gloves

How to prevent rust on aluminum?

Many metals erode or corrode, but the activity can be slowed or prevented. Aluminum, which is used to produce cookware, boxes, cutlery, and other household objects, is prone to rust and oxidation. 

When the protecting rust-proof layer on aluminum peels is removed, the metal is at its most vulnerable to corrosion. Cleansing aluminum on a routine basis helps to reduce or avoid corrosion. Preventing aluminum rust requires removing minor rusty patches as soon as they form.

Steps of preventing rust on aluminum are described below:

  • Using a steel wool pad, scrape any corrosion from the aluminum’s top. Tiny rust spots won’t turn into more significant rust if they’re treated on a routine basis.
  • Using a steel wool pad, spray a corrosion inhibitor on the aluminum. Scrape the corrosion remover into the tough spots.
  • Allow 5 to 10 minutes for the corrosion killer to work on the aluminum. Since corrosion removers are usually formed of chemicals that disintegrate the rust, they operate swiftly.
  • Using wipes or paper cloths, wipe away the corrosion remover. To eliminate any debris, wet a hand towel.
  • With a brush, apply a rust-proof metallic primer. The primer replaces the thick shield that has faded away over time. The primer serves as a deterrent against humidity, which causes corrosion.
Materials NeededTools Needed
Rust-InhibitorSteel wool
Rust-proof primerWipes

Here’s a highly recommended Rust-Inhibitor:

WD-40 300038 Specialist Long-Term Corrosion Inhibitor

Benefits of this product:

  • This Corrosion Inhibitor’s composition aids in the lubrication and protection of metal components from corroding.
  • When used indoors, it can last up to two years, if used outside, it can last up to one year. The substance adheres to metal, shielding it from air and water.

How to Prevent Corrosion in Aluminum?

When aluminum starts to corrode, it becomes brittle. Corrosion chips away at the metal in the same manner that rust does. It’s not a quick procedure. 

An aluminum item can corrode over a period of a few weeks, months, or even years. However, if left alone for long enough, aluminum items can acquire big holes due to corrosion. This is why keeping aluminum from corroding is crucial.

Aluminum can be protected in two ways:

  • First way:
  • Keeping aluminum in a climate-controlled atmosphere is one approach to keep metal from corroding. 
  • Corrosion occurs when climatic factors such as humidity cause a chemical change in aluminum. 
  • If at all feasible, keep your aluminum items in a climate-controlled area away from rainfall, moisture, and other environmental features.
  • Second Way:
  • Aluminum could also be clear plated to prevent it from corrosion. 
  • The clear covering is the process of applying a protective covering to the aluminum’s top. 
  • An undetectable transparent finish layer shields the metal from the elements on certain aluminum goods. 
  • The aluminum is never exposed to chemicals after it has been coated, safeguarding it from corrosion.
Materials Needed
Clearcoat paint

Here’s a top recommended clearcoat:

USC Spray Max 2k High Gloss Clearcoat Aerosol

Benefits of USC spray max 2k high gloss clearcoat aerosol:

  • Simple to apply two-component spray clearcoat that flows smoothly and dries to a high-gloss finish.
  • Aerosol is simple to utilize. Ignite it, stir it up, then spray it. Sprayer’s effects are delivered via a specific nozzle.

Frequently Asked Questions(FAQs): How to remove rust from aluminum siding?

Can you remove corrosion from aluminum?

Most moderate occurrences of aluminum corrosion can be eliminated by mixing filtered water with either fresh lime juice or white vinegar, then lightly rubbing the rusted region with a gentle scouring pad.

What is the best way to remove corrosion from aluminum?

Aluminum rust can be removed using vinegar, which is made up of equal parts water and vinegar. To eliminate rust, you could use a variety of acidic solutions. If you don’t mind minor superficial chipping, you can buff the aluminum frames after washing with a wire mesh brush or cotton wool. 

What is the fastest way to tarnish aluminum?

  • Fill a sprayer with ordinary bleach and squirt it on the aluminum. Allow the aluminum to sunbathe for several hours. 
  • Place the aluminum in the sunlight for a few hours. The sunlight assists the bleach damage the metal by speeding up the process.

Can you blacken aluminum?

Aluminum may be transformed from a boring grey to a vivid and striking black using a few simple components from your nearby retail shop. Anodizing strengthens the outer layer of aluminum and protects it from oxidizing. It’s also the only way to color aluminum effectively.

What is white rust on aluminum?

On aluminum and galvanized materials, white corrosion is very frequent. White rust is a form of corrosion that occurs on objects that have been galvanized or covered with a thick barrier of zinc. Spots of white corrosion begin to appear as water reacts with the zinc.

Does aluminum corrode easily?

Aluminum, on the other hand, is extremely corrosive. Aluminum rust, on the other hand, is caused by aluminum oxide, a highly strong substance that serves to protect the metal from further rust. Aluminum oxide rust also has a similar appearance to aluminum (dark grey to dusty white in color), making it less noticeable than corroded iron.


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