Which technique is often employed for repairing dents in metal skin?

Burnishing is a technique commonly used for repairing dents in metal skin due to its effectiveness in reshaping the metal without causing additional damage. This method involves using a specialized tool that smooths out the dent by applying pressure to the surrounding area, effectively restoring the metal to its original form. It is particularly advantageous for thin metal skins where welding or patching might cause complications, such as warping or additional stress concentrated on the repair site.

Using burnishing minimizes the need for intensive repairs and maintains the integrity of the surrounding material, making it a preferred option for dealing with shallow dents. While welding, patching, and replacement are also legitimate repair techniques, they are typically more invasive and may not be necessary for minor dents that can be resolved using the burnishing method.