What is a disadvantage of using aviation snips?

Using aviation snips does indeed leave marks on the material, and this can be considered a significant disadvantage, especially in applications where aesthetics or a clean finish is important. The design of aviation snips allows them to cut through various metals, typically aluminum and thin sheet steel, but this cutting action can result in distortion or scratches along the edges of the material being cut. This is particularly critical in aerospace applications where surface integrity and appearance are paramount.

In contrast, other options presented are not accurately associated with aviation snips. They are intended specifically for cutting metal, are generally easy to handle for those accustomed to them, and while some tools can rust if not properly maintained, high-quality aviation snips are often made from stainless steel or have protective coatings to minimize rusting. Thus, the tendency to leave marks during cutting is the most relevant and impactful disadvantage in the context of using aviation snips.