Well water. It leaves a rust colored film over everything it touches, including the cars

I am looking for information on a Filtration system for my sprinkler system. My house is on city water but the sprinkler is on well water. It leaves a rust colored film over everything it touches, including the cars. Can you make any suggestions as to what would be the best product for my situation?

The rust color is most likely iron commonly found in most wells.
Have a local lab or any water conditioning company test your water to make sure is iron and amount of iron in the water. Our whole house iron and sulfur filter are very effective in iron removal without using any chemicals. For more details please visit the following link:
http://doultonusa.com/whole_house_water_filters/Air-injection-iron-sulfur-water-filters.htmln