Brushes, like just normal brushes used for wiping away dust or loose soil from objects would be a nice thing to see added.
The main uses I could come up for it could be:
Being able to wipe away sand blocks revealing hidden small objects in sand found around ruins occasionally.
Wiping away snow because why not.
Erasing cave paintings.
Finding fossils in peat, specifically human and domesticated animal fossils/remains if a ruins happen to spawn right next or near by to the peat patch.
Being used to glaze foods with stuff.
To add gold and silver leaf to stuff to make them look like they're made of gold. (In addition to gold and silver leaf materials)
I think different types of brushes could exist. Primarily brushes could be made out of three things; one being thin metal that is only dropped from drifter and the drifter's companions (shivers, bowtorns, any others), the other being from strands of something with fiber, maybe tule, or flax or something.