Auto body repair shops always have a whole set of tools and equipment for repairing dents without painting and metal straightening. And although serious damage, and even over a large area, cannot be fixed without the use of stocks (powerful stands), it is quite possible to pull out dents in small areas with difficult access from the inside.
In this case, you need to use a special auto tool - a reverse hammer, which is a hand-held device, small in size, consisting of a metal bar and several weights loosely mounted on it. Weights can be of the same or different masses. At one end, the reverse (body) hammer has a hook, and at the other end it has a lock washer, which prevents the weights from falling off the rod and thereby transfers the impact force to the leveled surface. With the help of a reverse hammer, arches, thresholds, pillars, that is, those places that cannot be accessed from the inside, are successfully repaired.
Modern paintless dent repair tool usually consists of several types of grips, whichallow you to use the same reverse hammer to smooth out dents in different parts of the body.
Before using it, you need to clean the place to be pulled out to the metal, drill a small hole in it or weld special repair washers. Then you can fix the hammer. Further, the operator only has to gradually pull the metal, applying a series of light blows until the dent is completely eliminated. Of course, after such operations, it is necessary to paint part of the body, but only this method can be used to carry out high-quality repairs of some elements of the car. To eliminate oblong dents and edges, it is necessary to weld a few washers by inserting a metal rod through the holes.
In addition to mechanical type reverse hammers, there is a vacuum equipment that allows you to remove dents without damaging the coating of the body and, accordingly, without the need to carry out paintwork. Such a reverse hammer has a special suction cup to grip the equipment. It can be used to repair large areas. During operation, the vacuum reverse hammer is connected to the compressor to create its pneumatic fixation to the surface using compressed air.
Remember not to use a back hammer to flatten dents in large areas such as the center of the roof, hood and trunk lid. Welding washers may stretch too muchmetal, the part will become unusable. On sale there are hammers not only with one, but also with several weights, usually two or three. Such designs allow you to adjust the force of impact.
If there is no possibility or desire to purchase a ready-made reverse hammer, then you can create it yourself. To do this, you need to buy a stainless or steel bar 50 cm long and 2 cm in diameter, a steel weight (sleeve), an ebonite handle and a hook. You can also make a hook yourself using sheet metal 4 mm thick. If you want to make a vacuum reverse hammer, use a plunger suction cup instead of a hook.
