Three main factors that come into play with paint contamination is the climate your vehicle is exposed to, the time in which these contaminates have bonded and interacted with your vehicle’s paint and the condition of the paint when these particles embed and bond to the surface. Minimizing the time these contaminates are interacting with your vehicle’s paint is the best way to prevent damage. Also, applying a high quality wax or sealant will create a barrier for your paint and with proper and timely maintenance effects can be minimized or completely non-existent.