Effective Methods for Removing Aged Protective Foil from Metal Surfaces

I have a request - does anyone know how to remove the factory-applied foil as a temporary protection for tin window sills, garage doors. I haven't removed this foil for a couple of years and now it's very difficult to remove it. Does anyone have any positive experiences with this?
Regards

Electric heat gun, you need to slightly heat the foil and then it comes off, the remains of the glue that remains is (for me) denatured alcohol.

Hello.
A normal hair dryer is enough.

Qbuś wrote:

Electric heat gun, you need to slightly heat the foil and then it comes off, the remains of the glue that remains is (for me) denatured alcohol.

rather not really, I have such a very fine mesh and when it heats up, it comes off, between one mesh and the other, only a tiny piece.
I wonder if anyone has practically solved the problem of removing this foil as it is already heavily cracked?

Try different solvents. Nitro, acetone. Just check on an invisible piece to make sure the paint doesn't come off.
Companies that assemble plastic windows have special liquids to remove this film.

I would try to stick the adhesive tape after heating it up and tear it off right away, try it, maybe it will come off in larger pieces :D


happy!!!

It got me too. No chemistry helped, I tried alcohols,
trichlorethylene, and solvents. It looked like foil underneath
under the influence of time and the sun reacted with the material of the profile. I had to
use scrapers. Unfortunately, it is known that the surface must have become dull.
All in all, the effect is quite good, from a distance of several meters you can't see anything.

Hello. You have a problem buddy. After a few years, under the influence of sunlight /ultraviolet/, the film became stiff, because the compounds that gave the film flexibility (softeners) "sweated". Removing it from large areas became very difficult. It is not possible to restore the film to its original properties. What remains is the fun of tearing off small pieces by undermining the foil with a piece of e.g. sharpened plexiglass or even better polycarbonate / e.g. They can be successfully sharpened to the shape of a knife on a regular grinder. ATTENTION !
Do not use acetone or nitro solvent, which also contains a significant percentage of acetone /even up to 40%/. You can permanently damage the varnish or the material from which the window sill is made. For washing, use extraction naphtha, which dissolves the adhesive of the foil. You can put a cloth on the windowsill and moisten it with gasoline. It's cold and the gasoline won't evaporate too rapidly. After a few minutes, the film should be scraped off and the glue residue should be wiped off with a cloth dampened in gasoline. A lot of work, but it's the only way. And it should be remembered that the so-called The transport cover should be removed immediately after installing the window sill and making the so-called masonry treatments. Later, especially after a few years, we have a problem.
Good luck and persistence.

Leszek Andrzejczak wrote:

And it should be remembered that the so-called transport cover should be removed immediately after installing the window sill and making the so-called masonry treatments. Later, especially after a few years, we have a problem.
Good luck and persistence.

You don't need a few years, for me after 6 months it was no longer possible to get off the 2 windowsills on the south side of the building.

A hair dryer and extraction gasoline helped me

I know this is an old topic, but maybe someone has already solved this problem thanks to this. On one of the tin windowsills the foil was not removed. At the moment it is a "spider web" with pieces of foil but so welded that there is no way to catch and pick even for a month. Maybe there is a safe way to do this? Anyone dealt with this?

Butter only real 80%. Seriously. The fat will dissolve the films. You have to wait a bit for an hour and rub it with a dishwasher.

A hair dryer helped me. Great, thanks for the advice.