We took delivery of an 09 CR/B Cooper on 11-Apr-09 and had PPF installed on the 24th. The film guy is independent but the dealer let's him work in their detail shop. I washed the car for the first time about a week later and had pretty bad water spotting visible on the glass and black paint (it's been a while since I washed at home, the water's gotten harder). I used dilute vinegar to clear the spotting. The stripes look like they're spotted but on paint/glass the spots were faint outlines while on the stripes they look like faded gray areas. You can also see faint discolored spots under the film. I've tried vinegar, Hydro and Slick and the detail shop at the dealer used a couple of Griot's products. I wonder if this is just how black stripes look in the sun, if it is a lost cause or if there's some way to fix it.
This is a photo.