1. First, use a hot air gun to heat the concave position on the car, which can soften the concave part and is beneficial to the shaping of the concave surface.
2. Select a suction cup with an appropriate depression size, apply hot melt adhesive on the suction cup and stick it on the depression of the car. It takes several minutes for the hot melt adhesive to cure.
3. Use a professional puller to pull the sucker, and at the same time, directly tap the unloading force with a rubber hammer, and repeat the operation for many times until the pit in the trunk is pulled out.
4. Reuse the plastic pen, tap the protruding part to make its surface smooth, and then use crowbar tool to push out the depression from the inside, so that the depression on the car surface can be repaired.