If the dent is very small, there is no point in leveling it at all.
Attention! Hold a block of wood firmly against the back of the metal to absorb hammer blows and prevent the metal from stretching.
If the dent is in a part of the body that has a double layer, or something else makes it impossible to access from the inside, a different procedure must be applied.
1. Drill several small holes in the metal inside the damaged surface, preferably in the deepest parts.
2. Drive long, self-tapping screws into the holes so that they engage the metal firmly.
3. The dent can now be straightened out by pulling on the protruding screw heads with pliers.
4. The next step in the repair is to remove paint from the damaged surface and from the surrounding metal by about 2.5 cm.
5. This is done with a wire brush or with a grinding disc put on a drill, but it can be done by hand with sandpaper with equal efficiency.
6. To complete the putty preparations, scrape away the exposed metal with a screwdriver or file, or drill small holes in the damaged area.
7. This will ensure good adhesion of metal and glaze.
8. To complete the repair, see subsection 12.7.