Removing oxidation on siding requires a good cleaning.
How to remove steel siding.
The new panel you cut the top lock off scribe just under the lock and snap it off trim height if need to fit.
Step 2 removing the nails.
If you do start with those.
Remove the bottom portion of the damaged section.
You cut the damaged piece out a couple of inches below the top lock of that panel then nail that part down.
Metal siding section 1 overview.
If not pick a section of siding preferably one at the top or near an edge.
Put those away and simply make up a solution of 1 3 cup liquid laundry detergent and 6 gallons of water to use with the pressure washer.
Slide the separating tool underneath the bottom edge of the siding piece that is directly above the piece.
Aluminum and steel siding became popular in the 1950s and 60s as a cost effective choice to cover deteriorated wood siding.
When siding begins to look dull and lifeless oxidation is the culprit.
With a heavy duty puddy knife open up a little under the top lock and panel that you left.
Both metal siding types often were manufactured with a thin lining of foam designed to increase the insulation value of the siding.
Running a finger along the siding will come away with a powdery film that needs scrubbed away.
Insert your zip tool into a gap between the section of siding you select and the one covering the edge of it.
Chemicals you might use on wood or vinyl siding can cause damage to steel.