Here is a random shield tech for large vessels.

Idea: we have two major ways to push/pull elements in a large area: GPMP, PUMP
Experiments show that it is possible to generate an area with equilibrium force because gravity and pressure have different decaying scale. Meaning that you can hold powder/liquid/gas in front of your vessel as a shield. Those particles will float and stay in a semi-circular shape if point source is used.

However, I haven't tuned it so the shield now is quite unstable(but it works). Since I don't have time now, you can take it.

In fact a few minutes after I type that, I tweaked my old design a bit and it works well (not perfect but stable enough to form a solid circle). So it is really possible.
Hint 1: GPMP should be pushing, PUMP pulling as gravity decays faster
Hint 2: don't make it too big or air sim will cause instability
Hint 3: choose your particle wisely, not many particles are stable regardless of background gravity/air sim.
Hint 4: position of GPMP, PUMP is important, i.e. you can force the shield to be semi-circluar.

If you can find it out on your own, you could outright publish it with your name.
(Of course when I publish mine like a few years later, I won't give credit to others)
If you give up but still want to see my solution, I can PM you.

Also I am quite busy so I usually only works on techs that work without mods, otherwise not many people can see them even if I spend time on developing them.