We certainyl do... no sooner have I drove my car round the corner after a good clean and the back of my MINI is covered in light dirt. Then it just builds up.
I get an awful amount of salt on my MINI too, with doing 600 motorway miles each week. The Collonite 476S is doing a good job at protecting the paint work though, it can stand the salt. I just give it a rinse off when I can untill it gets to weekend when I can give her a proper wash
