If we want to know the orientation of face / surface we can use the Dispersion Scripts by Max Smirnov
https://moiscript.weebly.com/dispersions.html

So you will see if some surfaces must be "Flipped" or not!
But it's not automatic!
VDrop drops all vectors on any faces / Surfaces (select both surface(s) + vectors then call VDrop )


If a face is "flipped"
VOrient will orient the vectors on the other side! Alas works only for one surface in the same time!
Better than nothing but...

You can draw your vector with a Polyline and/or Curve for have any form of your vectors! ;)

Select both surface + vectors then call VOrient

Here the left surface is flipped...but the script VOrient don't works with selecting the 2 surfaces in the same time!


Does it possible to automatise this sort of thing ?

PS Tab + Flip call the native Hidden function Flip!