Commercial airline passengers are often alarmed by the aircraft damage that they can easily see. This includes everything from peeling paint, chipped coatings, and discoloration to streaking or weathered panels that look dramatic in a viral photo. Nonetheless, the scariest-looking exterior wear is not always the most dangerous. In many cases, visible paint damage is more of a mild maintenance concern than an immediate structural threat. The real question is not whether the aircraft looks worn, but rather whether the protective layers beneath the paint have failed and allowed corrosion to develop in critical areas. That distinction is extremely central to an understanding of aircraft safety. Paint onboard an aircraft is not just cosmetic. Rather, it is the aircraft’s first line of defense against moisture, salt, chemicals, and environmental exposure.