how to make cast aluminum look new

Introduction

Cast aluminum is a widely used material due to its strength, lightweight, and resistance to corrosion. However, over time, exposure to the elements can tarnish its appearance. Restoring cast aluminum to look new involves a process of cleaning, polishing, and possibly sealing it to protect its refreshed surface. Here is a step-by-step guide to help you make your cast aluminum look new again.

Step 1: Clean the Surface

Start by cleaning the aluminum to remove any surface dirt, debris, or contaminants that could scratch the metal during the polishing process.

1. Remove Large Debris: Wipe down the aluminum with a soft cloth to remove any large particles.
2. Wash with Soapy Water: Mix a mild detergent with warm water. Use a soft brush or cloth to wash the cast aluminum thoroughly.
3. Rinse Thoroughly: Rinse the aluminum with clean water to remove all soap residue.
4. Dry Completely: Use a clean towel or allow the aluminum to air dry completely.

Step 2: Remove Oxidation

Aluminum can form a dull oxide layer on its surface over time. To remove this and reveal the shiny metal beneath, consider using a specialized aluminum cleaner or a homemade cleaning solution.

1. Choose a Cleaner: An aluminum cleaner or a mixture of white vinegar and water can be effective for removing oxidation.
2. Apply the Cleaner: Use a cloth or soft brush to apply the cleaner to the aluminum surface.
3. Scrub Gently: Scrub the surface gently in a circular motion.
4. Rinse and Dry: Rinse the cast aluminum with clean water again and dry it off.

Step 3: Polishing the Aluminum

Polishing will help restore the metal’s original shine. Use a commercial polish or a DIY polishing compound for this step.

1. Select a Polish: Choose a metal polish that is suitable for aluminum, or make a paste with equal parts of cream of tartar and water.
2. Apply the Polish: Using a soft cloth, apply the polish to the aluminum in small, circular motions.
3. Buff: Buff the surface until it shines, adding more polish as needed.
4. Wipe Off Residue: With a clean cloth, remove any remaining polish residue.

Step 4: Protecting the Surface

To keep the aluminum looking new for longer, protecting the clean and polished surface is essential.

1. Choose a Sealant: A car wax or a silicone-based spray can protect the aluminum.
2. Apply the Sealant: Follow the manufacturer’s instructions for application to ensure proper coverage.
3. Allow to Dry: Let the sealant dry. This process may take anywhere from a few minutes to an hour, depending on the product.

Conclusion

Restoring cast aluminum to look new can be a rewarding DIY project. By following these steps to clean, polish, and protect your aluminum items, you can improve their appearance and prolong their lifespan. Be sure to work in a well-ventilated area and wear appropriate protective gear, such as gloves and safety goggles. If the aluminum is part of a larger item, like patio furniture, take care to not damage surrounding materials. Whether it’s car parts, garden furniture, or decorative objects, a little effort can significantly enhance the look of cast aluminum.

Additional Tips

• If your aluminum is anodized, be careful with abrasive materials and chemicals which may damage the anodized layer.
• For hard-to-reach areas or intricate designs, a toothbrush can be used to apply cleaners or polishes.
• Avoid using steel wool or other highly abrasive materials that might scratch the surface.