In these cases painting is usually your best option.
Cleaning faded aluminum siding.
Remove mildew or mold by adding bleach to the wash water or spraying a solution of bleach and water onto your siding with a garden sprayer.
All that cleaning wasn t for nothing.
Cleaning won t do you much good if your siding is really faded.
Give your aluminum siding a good rinse with the hose first.
It s not uncommon to have a mildew problem on aluminum siding depending on where you live.
To clean aluminum siding having mildew use a solution of one part bleach and four parts water.
If mold or mildew is the culprit spraying with a bleach solution will remove it.
By mimicking rain flow you know you re not damaging your house while you clean it.
Add one part bleach to 3 parts water.
Be careful as bleach will hurt your plants.
How to properly remove oxidation from damaged aluminum siding.
If you re going to repaint you need to make sure you completely remove grime dust pollen bird droppings and tree sap before you begin.
Spraying at a downward angle prevents water from getting under the aluminum siding and causing problems underneath.
Spray this mixture on remaining spots.
Make sure to protect your eyes the rest of you hair etc so the bleach will not harm you.
I recommend using a spray nozzle with an angled setting and working from the top down.