In the context of release of a foulant from the coating, both the normal as well as shear displacement of the surface of the film relative to that of the foulant should facilitate release. The amplitude of instability, nonetheless, would be the main parameter that is directly relevant to the generation of elastic repulsive force needed to dislodge a hard foulant from the coating. These amplitudes were estimated using a Gwyddion V 2.60 software (see experimental section), which is designed to analyze the height fields of structures captured via micrographic methods.