How can you repair minor scratches or light corrosion yourself?
Aluminum pergolas can develop minor surface damage over time, but with the right handling, you can easily restore them to like-new condition. Here are some of the most common issues you’ll run into.
One frequent problem is surface scratches. These often happen during installation or moving, or from accidental bumps with nearby hard objects. While aluminum alloy bases don’t rust easily, a scratched coating can detract from the appearance and potentially lead to corrosion if left unchecked.
Another thing to watch for is corrosion. If you live near the coast or in a humid area with industrial pollutants, you might notice white powder or small spots on the aluminum surface. This usually stems from exposure to acidic or alkaline substances, or electrochemical reactions with metals like copper or iron in damp conditions. Aluminum is pretty corrosion-resistant, but if you spot that “whitening,” address it promptly.
Additionally, if the paint film starts bubbling, peeling, or losing its shine, it’s likely due to long-term exposure to sun and rain, causing aging. This won’t compromise structural safety, but it’s best to fix it soon to prevent further spread.
For these minor issues, you can try DIY repairs.
For shallow scratches, it’s straightforward. First, wipe the area clean with a damp cloth, then apply a bit of toothpaste and rub it in circular motions with a soft cloth. The mild abrasives in toothpaste smooth out the edges effectively for less noticeable marks. Rinse with clean water afterward, and the surface should look smooth again. If the scratch is prominent on colored panels, pick up a furniture touch-up crayon in a matching shade, apply it, and gently buff it flat for good coverage.
If you see light white corrosion spots, don’t panic. Start by gently scrubbing with a neutral cleaner (like diluted dish soap), then rinse thoroughly with water and dry completely. If the spots persist, head to a hardware store for some high-grit wet sandpaper (like 800-grit or finer), wet it, and lightly sand the area until the spots vanish. Be gentle—the goal is just to remove the corrosion without over-sanding. Finish by applying a thin layer of wax for extra protection.
In everyday maintenance, here are a few tips worth sharing: Never use strong acidic or alkaline cleaners (like toilet bowl cleaner or cement removers), as they can seriously damage the aluminum surface. Keep an eye on seams, gutters, and drainage areas around the house to ensure they’re clean and free of standing water—this prevents many issues. It’s a good idea to do a full inspection once a year, checking the coating, screws, and connections, so you can catch small problems early and avoid major repairs later.
The key to maintaining an aluminum pergola is regular checks, early fixes, and the right methods. Handling minor scratches and corrosion spots yourself is easy and can significantly extend its lifespan. If the damage is extensive or severe, it’s best to call in professionals for help.
