How can I efficiently remove this thick paint-like substance off of my prelude?

I used orange cleaner to get it off the drivers side of my windshield, but that stuff is way to abrasive to use on the paint.

I have heard clay-bar, but I think that might take me hours? Any idea's?










Oh btw, I was beside a box truck on a 285 on ramp and I think his hydraulic system exploded or something because there was a "BOOM" then crap went spraying everywhere and all over my car. I thought it was oil but this is very very similar to paint.