Take two water balloons and some two-part instant foam insulation. You can get it from a hardware store. Fill one balloon with part A of the insulation mix, and the other balloon with part B. When they are both thrown at the target they pop, mix and foam. You throw them at the vehicle’s radiator. It will foam into the radiator and harden.
Another approach is to throw a bag of flour into the air intake. It will clog the air intake and the motor will die right away.
Laser pointers can also wreak havoc with the armed escorts, blinding them either temporarily or permanently depending on the wavelength/color.
“It will clog the air intake and the motor will die right away.”
I meant it will clog the air filter.