2nd wash since ownership

[Limeybastard]

So after washing my car I notice a strange sort of hazing on the front passanger side fender arch sidewall. As I followed the fender curve down I ended up seeing something that wouldnt come off unless I used a clay bar. Anyone know what this stuff is by any chance?

Whatever it is was easy to remove with clay, however areas that it covered lightly were only noticable with a slight hazing.

Once it attached itself to the clay bar, it made the clay somewhat greasy feeling.