This research introduces a new method for numerically assessing the mechanical effects caused by the impact of thermal spray on walls. The Spray-Induced Wall Stress (SIWS) model, proposed recently, accounts for the interactions between the spray and the wall, leading to the formation of wall stress within the Lagrangian spray modeling framework. The primary aim of this research is to provide a mathematical explanation of the underlying physics of the model and validate it against existing experimental data. The remainder of the study focuses on applying the model to hot-surface configurations, such as flat hot surfaces and ignition assistance devices like the glow plug system. The results demonstrate the mechanical impact of high-speed spray jet impacts, leading to stress on the rigid body of the system. This research emphasizes the effectiveness of the SIWS model in determining mechanical stress, an aspect lacking in current Lagrangian spray models.