Precisely. How will Spiderman hurt Iron Man?
Spiderman is quite smart actually, but not on the level of Starks. As such...no, I seriously doubt that he could, on the fly, understand how Starks' suit works. He had not idea that the circuit relays in his web cartridges could be used with Hawkeye's arrows to channel energy from Captain Marvel and Human Torch into Iron Man's armor to blast from under that mountain in Secret Wars #4, for example. That was the Jimmy Rhodes Iron Man, of course.