Sooner or later, every car owner will be faced with rust on the body. Worst of all, he probably won't be able to do anything about it. If the case is also started, then very soon terrible rusty holes may appear on the car. How to be in such a situation? In fact, it is not at all necessary to seek help from a master. The restoration can be done by hand.
What you need: polyurethane foam, solvent or degreaser, masking tape, paint, varnish, aerosol primer, car putty.
The restoration process is laborious and very responsible, however, according to its logic, it is not at all tricky. First and foremost, you need to cut off all the rusted material. This can be done with a grinding tool. It is very important to remove all rust and clean some more space around the affected sector for greater reliability. After that, degreasing, cleaning and foaming of the hole is carried out. If work is being carried out on the threshold, then for greater convenience it is recommended to put a cardboard underneath.
You do not need to regret the foam. Moreover, it is necessary to make every effort to ensure that the insulating material is blown into the hole as much as possible. This is necessary in order to provide a sufficient contact area. As soon as the foam dries up, a sharp knife is used. With its help, all unnecessary is cut off. You need to trim so that the foam matches the shape of the body.
The next step is to apply masking tape strips to the entire restored body surface in order to separate it. Next, putty is carried out using epoxy resin. If the hole in the body was through, then putty should be applied on both sides.
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Apply the material in excess. Epoxy dries quickly, so it can be rough. Moreover, the next stage is surface grinding. After that, one more cleaning and degreasing is carried out, followed by a finishing putty.
So the simplest remains. Wheels and plastic parts of the car are covered with protective equipment from the side of the hole. The place of restoration is covered with a primer, after which painting is carried out.
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Continuing the topic read why does the car body rusteven if galvanized.
A source: https://novate.ru/blogs/290420/54324/