This case study focuses on the innovation of spray painting processes for automotive window trim in the automotive manufacturing sector. By introducing collaborative robots to replace traditional XY-axis reciprocating machines and integrating turntable spray painting technology, it achieves efficient and uniform coating of various window trim shapes, including straight strips, curved strips, and corner brackets. This transformation not only significantly increases painting speed by approximately 10 seconds but also ensures consistent coating quality across all surfaces of complex-shaped trim pieces, marking a significant advancement in automated painting operations within automotive manufacturing.