Rust signifies old outdated attitudes. Spiritually, we may have to reconsider ideas that are harmful (corrosive) before we can progress.
Psychological / Emotional Perspective:
To dream of cleaning up rust suggests that we recognize our own negligence. Dreaming of rust appearing as we look at an object signifies that a project has reached the end of its useful life.
Everyday Material Aspects:
Rust represents neglect and negligence. We have not looked after the quality of our lives properly and should look to address this oversight.
Consult the entries for Iron and Metal for further information.