in theory couldn't you put styrofoam in the gas tank to cause napalm to be made in the car igniting when it hit the spark plugs, or would it just be like putting sugar in the tank?

And the m100 thing, could you make a fuse that fits through a potatoe, and jam it in the exaust pipe and really fuck shit up?

Neither of these would blow up the car but hopefully it'll fuck with it.

Well, yes, you could (in theory) extract it formn the binder using gasoline as a solvent, but it would be a total waste of time as the RDX is more powerful, stable, and easier to work when bound with sebacate and polyisobutylene.