To dream of dust represents aspects if yourself or your life that have been neglected or ignored. Some area of your life that has not been noticed in a while.
To dream of yourself dusting something represents revisiting of old ideas or starting with a new slate. Clearing out past mistakes. Feeling that you have to pay more attention to something you have ignored for a while.
To dream of yourself covered in dust represents feelings of needing to catch up reinvent yourself, or make a fresh start. Having to reassert yourself or reinvigorate your life after a period of being overlooked.
Example: A woman dreamed of picking up a dusty gold object and dusting it off. In waking life he was taking care of her very sick and dying ex-husband. She was reconsidering the idea of abandoning her care of him to go back to living her own life