Windrunner Lashings

I was thinking about hypothetical applications of lashings and had some interesting questions:

1) Since lashings work by redirecting your gravitational pull, could a Feruchemist with access to iron stop themselves from being lashed?

2) In Rythm of War, Raboniel mentions Fused being able to travel through space, but then dying from lack of air and pressure. How could lashings work in a zero-gravity environment? Were they just traveling through inertia, unable to change their direction?

3) Theoretically, could a Windrunner in some sort of spacesuit leave a black hole?