Emissions from chemical plants, industrial fallout, surface contaminants and other organic and inorganic materials are all components of acid rain. When these elements are deposited on your car’s surface in a dry state, they appear as dust. When the dust gets wet, however, from dew or rain or snow, you now have a sulfuric acid mixture on your vehicle’s paint finish. If this is left on your car for any period of time, especially if left in direct sunlight, etching may occur on the finish. Damage from acid rain can range from slight discoloration to pitting. Regular professional car washing can prevent any damage to your car, protecting not only the appearance, but also the value!