This paper based on high appearance car benchmark and the new technology of painting(multipass paint spraying process),the new paint material(high appearance,high colour density paint,etc.)development and application,joint product modelling and color design,from modelling,process,equipment,materials,fine to debug the synergy of many sided,optimization,practice repeatedly,produce the high level appearance,colorful carbody,high texture,high glossness fully painted carbody,appearance of perceived quality improved significantly,improve the competitiveness of products.