Which of the following should NOT be used for wiping away swarf during repairs?

Wiping away swarf, which is the debris produced during machining processes, requires careful handling to ensure both safety and cleanliness. Using bare hands to remove swarf is not advisable because the particles can be sharp, abrasive, or contain harmful substances. This practice poses a risk of injury or skin irritation, making it particularly unsuitable in a repair environment where metal shavings or other debris might be present.

In contrast, the other options, such as gloves or a cloth, are designed for protection and effective cleaning. Gloves provide a barrier against potential cuts and contamination, while a cloth can safely absorb and collect swarf without risking injury. An air blower is also a good choice for clearing debris without the need for physical touch. These methods prioritize safety and maintain a clean workspace, reinforcing the importance of using appropriate materials and techniques in aerospace repairs.