The singers were a bit 'rusty' after the long break.
My tennis skills are a little 'rusty'.
a 'rusty' old car
(..) obviously very clever. It could be dangerous. Oh, darling. Not to worry. Trust me. I may be a bit rusty, but I'm perfectly capable of taking care of myself. I congratulate you, Chief, on your excellent facilities. Of course you understand that my visit here must be of the utmost secrecy? (..)1975 The Return of the Pink Panther