St Paul's held their nerve to book a spot in the Wheway Memorial Trophy final with a penalty shoot-out win over high-flying Jersey Scottish.
Craig Russell put St Paul's ahead but a last-gasp James O'Haire equaliser sent the semi-final into extra time.
There were no further goals, before St Paul's clinched the game with a 4-2 shoot-out win.
The defeat ends Scottish hopes of a clean-sweep of the top Jersey football trophies this season.
Guernsey Northerners and Grouville meet at Springfield in the other semi-final on 28 February.