dave6666
Enthusiast
I have used odorless mineral spirits on small areas to remove stubborn spots. I have also seen body shops do the same thing. However, if I were you, since your problem involves 25% of your car, I would not experiment. I would just bring the car into a competent high end body shop who have handled similar incidents. You will probably see them pull out the 3M product referred to above or a can of mineral spirits ( which is also a weak paint thinner ) and remove the offending substance. It must be some form of fast drying glue.
Great advise as usual, with the only difficult detail being finding a high end body shop. At least around these parts it is.
Want us to spray some bedliner in the trunk after we buff her out?
Anyway, the reason that WD40 is so popular for removing crap is that it is 50% mineral spirits. For the purist though, follow with soap, rinse, wax.