This is happening at an alarming rate on this list, including someone that opened the hood in the garage and ran the garage door down. ( No not me )

Changing the cowl is major fenders off / dash / windshield / HVAC out job, then there is the issue with rust proofing hidden areas.

Some spot weld dent puller action to get it roughed out then putty to finish up will be fine. Spot weld dent pullers use nails and a puller not the drill a hole and insert a screw.