Rusty is in what part of speech?

"Rusty" can be a few different parts of speech depending on how it's used in a sentence. Here are some examples:

* Adjective: Describing a noun, like "The rusty car was a relic of the past."

* Noun: Referring to a person, place, or thing, like "The rusty was covered in dirt." (In this case, "rusty" might be slang for someone who is old or outdated.)

Can you provide more context about how "rusty" is being used in your sentence? That would help me determine the part of speech.