Polarising filter. It's the only way!
•Looking at the picture I don't feel a pair of 8m x 8m opaque cloth blockers were a realistic option!![]()
•in future those pesky reflections will be a thing of the past.
•Ooh Kodiak, I may have to disagree.
I don't think a CPL would have solved the issue... It will help kill the highlights, but the shadows/contrast would largely remain. IMO the only typical option is to reposition... either the car or the camera.
•Think laterally... knock down the building

Couldn't agree more. Hence my comment #2 "Polarising filter. It's the only way!"Dont stop at the building you could also knock down the the stuff making up the bloody awful background which is more distracting than the reflections.
Bottom line Alan (Ukmade) is that unless it was your own car you were never going to get a good shot unless you could move it. Sometimes the shot you want is just not practical due to circumstances.![]()