[sc_rufctr]

More than 30 years ago I worked in a car factory. One of the jobs I did was to wash off a coating that was applied to small vans that had been imported from Japan.
It may have been the same Cosmoline coating but I don't know for sure. It's like a spray on wax.
We used a solvent to remove the stuff. From memory the solvent was very mild but you had to wear gloves to use it.
You just slopped the solvent on with a rag and the coating immediately washed away.

I can see why it's been left on this particular car but there's nothing special about it.