Paid to have the first application of Fluid Film applied on my truck for approximately $200.
After that, we bought the application gun and one gallon of Fluid Film (on line) for approximately the same amount and now apply it ourselves. However, you need a source of compressed air for the application gun.
A gallon is enough fluid film for two vehicle and costs approximately $40
Great protection again these NH winters.
https://www.fluid-film.com