#soiling__soilure__dirtying  the act of soiling something
  supertype:  change_of_state  the act of changing something into something different in essential characteristics
  subtype:  spotting__staining__maculation  the act of spotting or staining something
  subtype:  contamination__pollution  the act of contaminating or polluting; including (either intentionally or accidentally) unwanted substances or factors
     subtype:  dust_contamination  the act of contaminating with dust particles

No statement uses or specializes soiling; click here to add one.