Face rotation to object rotation

Hey there,

I’m looking for a way to apply a face’s rotation to the object itself. In this case, my objects with a rotation of 0, 0, 0 consist of one rotated face each. In other words, I’m looking for the reverse of apply rotation.

Thanks in advance and have a nice day,

Marv

Select face, ctrl+alt+space to make a custom orientation. Object mode, object menu -> transform -> align to transform orientation.

Thank you so much, you made my day.
Have a nice one!