What kind of paint is the blue paint on Shanghai buses?

Waterproof paint. Shanghai bus blue paint is waterproof paint. Shanghai, referred to as "Shanghai" or "Shen", is the People's Republic of China *** and the country's provincial administrative regions, municipalities, national center, mega-cities, the core city of the Shanghai metropolitan area, the State Council approved the determination of China's international economic, financial, trade, shipping, technology and innovation center. Innovation Center.