Combine a few slices of fresh lemon vinegar and warm water in a five gallon bucket.
How to take off aluminum siding.
Rinsing with the solution may also help remove soap scum if you started with the laundry detergent method.
To reach the flange you need to remove the aluminum siding trim around the window but that may prove difficult.
Place scraps of wood underneath the edge of the upper piece to expose the nail flange of the piece that you are removing.
Inspect the siding for loose sections.
Make sure the aluminum siding is still wet from the rinsing step.
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.
The wood will hold the upper piece of siding out of the way.
If you re using a traditional chemical sprayer pump the tank until you feel resistance.
With the ryobi chemical sprayer you just pop in a battery and turn it on.
Wash away paste with hot water.
Pull out the bottom locking edge of the siding from the section below it with a siding removal tool.
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.
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.
Locate the area of your aluminum siding that is damaged.
Combine cream of tartar with baking soda.
You will use the utility knife to cut or score two vertical lines on either side of the damaged part of the siding.
If none are loose then start at the top section.
Slowly add hydrogen peroxide until a thick paste forms.
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.
A loose siding section may be the easiest to remove.
How much you use depends on the size of your home.