A set of doodle brushes.
Tip: Use lighter colors for better effect.
Set the layers you want the notebook paper to show through to on multiply.

Doodlers
Paper yellowing + smudging
Paper
A set of doodle brushes.
Tip: Use lighter colors for better effect.
Set the layers you want the notebook paper to show through to on multiply.
Doodlers
Paper yellowing + smudging
Paper