to be dusted
The German word 'gestaubt' is the past participle of the verb 'stauben', which means 'to dust'. It is used to describe an object that has been cleaned of dust. For example, 'Die Möbel sind gestaubt' means 'The furniture has been dusted'.
I dusted the table.
This phrase means that the speaker has removed dust from the surface of the table.
You dusted the book before you read it.
This suggests that the person spoken to has cleaned the book of dust prior to reading it.
We dusted the shelves.
This phrase means that the speaker and potentially some others have cleaned dust off of some shelves.