The perceived quality of a vehicle is strongly affected by paint appearance that shares major part of the outer car body panels. The painting process modifies the surface topography in a wide range of roughness and waviness scales, and consequently modifies the functionality of the surface in terms of appearance. Since painting process is a multistage process leading to stratified surfaces, a multiscale surface topography characterization approach is suited. In this paper, 2D multiscale signature of the painting process was introduced and applied to track the effect of the painting process working variable on painted surface topography in a wide range of wavelength. To this aim, experimental painting tests were performed using three painting orientation modes (horizontal, oblique and vertical) on random and deterministic metal sheet surface textures. Results show that the painting orientation mode affect only the wavelength band greater than 500 μm and optimal painting orientation depends strongly on the texture of the initial sheet surface.