When you said you wanted some work done to your car, this is not what you had in mind. Is this some sort of special technique you don't know about? I think it's time to bring the car right side up again and bring it somewhere else.
It's a new trend. You pour cement on your car instead of paint. It has a rough look, it's unique and it's tougher than paint. Just make sure you start driving right away and don't stop driving until it dries or it is going to get stuck and never move again.
Regretting that decision to go on the roller coaster? Looking at this picture, I am regretting it for you. Nothing like hanging out of control and needing to be rescued back to safety with nothing but a tiny little seatbelt holding you up. Fun times!