Yes, it is a form of the verb "to rust" (oxidize, crumble). It is the past tense and past participle,and can be used as an adjective (rusted metal).
Synonyms for the adjective 'rusty' are rusted, oxidized, or corroded.
No, "rusty" is not a verb. It is an adjective that typically describes something that is covered in rust or has become rusty.
rusted root
Rusted Rail was created in 2006.
Rusted Root was created in 1990.
In These Rusted Veins was created in 2009-11.
Rusted Pieces was created in 1991-04.
The past tense of "rust" is "rusted."
Rusted Angel was created on -19-09-08.
Rusted from the Rain was created on 2009-05-19.
Rusted Root Live was created in 2004.