Instead consider a heat gun to be a supplement to manual scraping.
Heatgun to bond siding.
Screws are placed trough the metal siding where it is doubled up on the lower course.
If you have metal siding near the pool spa it must be bonded along with screen cages window frames or whatever just like the ladder.
Use these tools for big projects or house siding that needs all the paint removed.
Imagine a high quality manual hair dryer then multiply the heat several times more.
Infrared ray tools which operate at a much lower temperature than a heat gun and are very effective in breaking the bond between the paint and the substrate.
Roll from the center out each way while applying heat.
It is possible to start a fire with a heat gun but far less chance than if you used a butane torch.
After it cools the bond is good and will not creep.
These tools are up for the long run times and provide an ergonomic grip for extended use.
There was a lot of confusion about this sheet metal screw thing but i think that really only applies to how you fasten a lug or bond wire not the connection of each piece.
So if you have to install vinyl in cold weather do so in your climate controlled garage and try to arrange to keep the newly decorated sign or vehicle there for a few days before releasing it into the wild to brave the elements.
Remember it generally takes a few days for adhesive to completely wet out or bond to a substrate.
Then heat the veneer with a heat gun and roll the veneer with a laminate roller or even a wall paper roller if the work is small.
This is usually accomplished by running bond wire to a solid ground such as a ground rod or the exterior spigot.
Use less water than the package says.