Rinsing with the solution may also help remove soap scum if you started with the laundry detergent method.
How to take off aluminum siding.
Locate the area of your aluminum siding that is damaged.
The wood will hold the upper piece of siding out of the way.
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 you cannot cut through the aluminum with a utility knife and strength you can use a screwdriver and hammer to get the line started.
Put on your protective gloves safety glasses and face mask before you start spraying.
You will use the utility knife to cut or score two vertical lines on either side of the damaged part of the siding.
To reach the flange you need to remove the aluminum siding trim around the window but that may prove difficult.
How much you use depends on the size of your home.
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.
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.
Slowly add hydrogen peroxide until a thick paste forms.
Place scraps of wood underneath the edge of the upper piece to expose the nail flange of the piece that you are removing.
Spray tsp onto wet aluminum siding.
If you re using a traditional chemical sprayer pump the tank until you feel resistance.
Pull out the bottom locking edge of the siding from the section below it with a siding removal tool.
Make sure the aluminum siding is still wet from the rinsing step.
A loose siding section may be the easiest to remove.
You can also cut the siding back far enough to reach the flange and then install.
Combine cream of tartar with baking soda.
If none are loose then start at the top section.
With the ryobi chemical sprayer you just pop in a battery and turn it on.
Directly scrub the aluminum siding with a soft scrubber dipped in the mixture.