How to Remove Aluminum Oxidation

Your aluminum can shine like this, too!

Aluminum is a naturally occurring material that is used to make everything from car parts to soda cans. While this material won't rust like iron or steel can, exposure to the air can cause aluminum to oxidize, which creates discoloration and takes away the metal's polished finish. Oxidation occurs when the chemicals that make up the material interact with oxygen molecules. Because of this, there's very little you can do to prevent oxidation, but it is possible to remove it using a bit of elbow grease, leaving your aluminum looking shiny and new.

Things You'll Need

• Rags
• Paint remover
• Water
• 400-, 800-, 1200-grit sandpaper
• Dremel tool
• Polishing wheel/bit
• Metal polish
• Dish detergent

Instructions

1. Disassemble the object. If you're polishing an item that can be taken apart, like rims, remove as many pieces of the object as you can before you start. This means taking the rims off the car, removing valve stems, and covering or removing any other applicable parts.

2. Remove the clear coating. Aluminum products are usually sealed with a clear coating that helps prevent corrosion. To remove this coating and polish the item, simply dip a clean rag in paint remover, and use it to wipe down the object, making sure to clean any nooks or tights spaces.

3. Sand the item to remove oxidation. Sand first with wet 400-grit paper, then repeat with 800-grit, and finish with 1200-grit. On the final stage of sanding, sand in one direction only.

4. Place a polishing bit on a Dremel tool, and use it to buff the item. Apply a small amount of metal polish to the object as you buff.

5. Give the object a final cleaning to remove any excess polish and grime. This final cleaning should be done using water and dish detergent, or a similar cleaning product.

Tips & Warnings

• Wear goggles and work in a well-ventilated area when working with these types of tools and chemicals.

• Do not use steel wool for polishing aluminum, as it tends to encourage future oxidation.

Resources

• Read this Article in Spanish