Terahertz technology offers a non-contact and non-destructive solution for high-precision automotive paint inspection. It can accurately measure the thickness of individual layers—including primer, basecoat, and clearcoat—in multi-layer coating systems without damaging the surface. This allows for rapid detection of defects such as uneven application, bubbles, delamination, or contamination embedded between layers. By ensuring consistent paint quality, optimizing application processes, and enhancing long-term corrosion protection, terahertz inspection significantly improves manufacturing efficiency and final vehicle durability.