How to Treat Oxidized Auto Aluminum Trim

Aluminum trim was used on older vehicles as fender trim, wheel-well trim and body-line trim, and was also used around windows and windshields. Most modern vehicles now use plastic or chrome trim rather than aluminum. Oxidation occurs on aluminum trim when it has been exposed to UV rays and natural elements. Sanding the trim can remove the oxidation, but it can leave deep scratches in the aluminum. Learn how to treat oxidized auto aluminum trim correctly so your trim looks better without becoming damaged.

Things You'll Need

• Aluminum cleaner
• Cotton towels
• Water
• Aluminum polish
• Microfiber towels
• Phillips screwdriver
• Flat screwdriver

Instructions

1. Remove the aluminum trim from the car, if possible. Otherwise, place masking tape on the painted surfaces around the trim. The cleaner may be harmful to the paint on the car, so should not come in contact with the paint.

2. Unscrew the Phillips screws holding the trim in place. For fender trim, the screws are on the underside of the trim. For aluminum trim around windshields, lights and glass, use a flat screwdriver to gently pry the trim up and away from the car, being careful not to bend or crease it. This type of trim is installed by pushing it down and snapping it into place.

3. Scrub the aluminum trim with aluminum cleaner and a cotton towel. Thoroughly coat the trim with the cleaner and rub it vigorously with the towel until the oxidation is gone. Rinse the cleaner off with water and a clean cotton towel. Use the towel to help remove the cleaner. Let the trim dry.

4. Wipe the trim with aluminum polish and a microfiber towel. This brings a shine to the aluminum and adds a layer of protection from future oxidation and tarnish. Let the polish dry for 10 minutes before replacing the trim on the car.

Tips & Warnings

• Read the labels on all products before using them near the painted surfaces of your car.

• Wear latex gloves to prevent any reaction between the cleaner and your skin.