Use an old rag to rub the paste on aluminum as the best way to clean rust off metal and let it sit for one hour.
How to take off aluminum siding.
Locate the area of your aluminum siding that is damaged.
Pull out the bottom locking edge of the siding from the section below it with a siding removal tool.
Pull the bottom down and away and then you should be able to simply unzip that piece horizontally across the wall all the way down to the end.
Place scraps of wood underneath the edge of the upper piece to expose the nail flange of the piece that you are removing.
A loose siding section may be the easiest to remove.
How much you use depends on the size of your home.
Rinsing with the solution may also help remove soap scum if you started with the laundry detergent method.
If you cannot cut through the aluminum with a utility knife and strength you can use a screwdriver and hammer to get the line started.
Make sure the aluminum siding is still wet from the rinsing step.
Using a metal clothes hanger or other small hooks dig into the end of one of the pieces of siding which will allow you to pull it off.
If none are loose then start at the top section.
Wash away paste with hot water.
Spray tsp onto wet aluminum siding.
With the ryobi chemical sprayer you just pop in a battery and turn it on.
Combine a few slices of fresh lemon vinegar and warm water in a five gallon bucket.
If you re using a traditional chemical sprayer pump the tank until you feel resistance.
Slowly add hydrogen peroxide until a thick paste forms.
Put on your protective gloves safety glasses and face mask before you start spraying.
Inspect the siding for loose sections.
Combine cream of tartar with baking soda.
You can also cut the siding back far enough to reach the flange and then install.
Directly scrub the aluminum siding with a soft scrubber dipped in the mixture.