1. Applying dust 

Simple select any object, and click "Dustify" in the dusty panel on the right side of the viewport

2. Shader Controls

A shader node will be added to all materials on the selected objects. 

GLOBAL - controls the overall amount of dust

Dustiness - A general control to increase overall dustiness from a base value.

Layering - Adds a second layer of dust over top. Can be used to smooth the dust look or to make it more splotchy.

Slope Influence - Controls how much the slope of an object effects dust. Higher values cause dust to not appear on sharper slopes

Slope Tolerance - used to control how much dust can build up on a slope regardless of the slope influence. Use this to add a micro buildup of dust on slopes for added realism.

Accumulation - causes dust to buildup and clump together around rounded edges of objects.

3. Geometry Nodes Controls 

A shader node modifier will be added to all selected objects. 

Seed - Controls the seed value when distributing hairs on object. 

Resolution - Controls the amount of distance between hair segments. Lower values will have more geometry.

Amount - Controls the amount of a hairs distributed on an object.

Length - Controls how long each hair can be. Shorter hairs require a lower resolution distance.

Frizz - controls how much hairs curl outward.