The streak of a brush, i know it sounds wierd alone, but try it!if you put a few streaks in a natural drawing pattern it sounds like actual drawing, but don'ti used it for an intro where the title is revealed with a few brush streaks.
This is a recording of me brushing my teeth. The toothbrush did not work at the beginning so i tapped it against the counter in an attempt to make it work. Ew.