What should be used to apply the sealing coats on a fabric-covered aircraft?

Applying sealing coats on a fabric-covered aircraft primarily requires tools that ensure an even and consistent application while promoting adhesion to the fabric surface. A spray gun is the optimal choice for this process because it allows for a smooth, uniform coat over the fabric, minimizing the risk of runs or drips that can occur with other application methods.

The aerosolized form of application provided by a spray gun allows the sealant to penetrate the fabric effectively, ensuring that all fibers and seams are properly sealed for enhanced durability and protection against environmental elements. The controlled spray pattern also enables access to complex shapes and contours of the aircraft, ensuring that the sealant is distributed evenly without leaving brush marks or patterns that might occur when using a softer brush or other manual application methods.

While other methods like a soft brush, paint roller, or sponge can be used for certain applications, they do not provide the same level of efficiency and quality of finish that a spray gun does, especially in the context of covering larger areas or reaching tight spaces on fabric-covered surfaces. Thus, using a spray gun is essential for achieving the best results with sealing coats on aircraft fabric.