Antique Juice King Bronze (i Think) Tabletop, Little Bit Of Rust (it's Green). What Do I Use To Clean It?

Bronze (i think) tabletop, little bit of rust (it's green). what do i use to clean it? - antique juice king

My mother mentioned the lemon juice, but not exactly remember.
Old Persian painting is a hand carved, so that you can not afford to lose.