Composite prop damaged by pulling
You can damage a composite prop by pulling on it, if done badly. My composite prop was damaged on the rear edge of the blades (where they are thin), where a rampie pulling hard caused the rear edge to chip where his stiff gloves twisted/rolled over the thin edge and broke some chips off in a few places. (Had to get repairs done.)
So I never push or pull by the prop, and insist that any rampies don't do so either.