Fill the dent with the two part auto body filler.
How to repair dents in aluminum siding.
It doesn t take a lot of force to pull out the dent.
Sand the patch to remove all roughness and paint it to match the siding.
Next pull on the screw with a pair of pliers.
Sanding sponges work well.
Use a putty knife to scrape the surface level with the siding.
Hopefully the dent will pop out and the siding will be good as new.
Drill a couple of 1 8 inch holes in the part of the siding that contains the dent.
Drill a hole in it drill a small hole in the center of the dent.