It's always hard to tell without seeing the depth and width of the scoring but..
We live in the southwest, and I'm always telling my wife to not try and squeeze past other tourist
cars on the lanes especially when there are lovely bramble bushes on the passenger side.
Their needles leave those super thin but very deep scratches all down the left hand side of her car. (Bonnet to rear quarter)
So far though - I've been able to "fill them up " with a polish with fillers in.
I've had good results with Auto Glym Super Resin Polish - but you seem to need to use more on the application cloth than you think is required for best filling results.
Not so much that you leave a horrible thick white powedery coating on the paintwork though - would be hell to get off by hand without leaving marring.
Really work it in with a terry pad until it almost disappears - then leave couple of mins - then buff off with a microfibre - rinse and repeat if necessary - maybe the second time applying with a foam applicator to make sure your not overdoing it.
This article comparing polishes that cut and fill should give you some idea of what can be achieved by hand.
Auto Glym SRP Versus Other Cut and Fill Polishes