Brep pinches with lines

Hi all

I'm here again because i would like to try to do an experiment, i'm started with a brep, i built 2 curves, tween thoose with a range factor, then i project the curves on the brep, now i was thinking to use this curves as attractors to pinch the brep, but I'm stuck at this point, i'm look a lot for a tutorial or something that can helps me but notghing.

Can somenone help me to understand how to do that?

here some image to understand what i'd like to do

Here a section of the final result