There are sprays for rust but the ripening figs will also be sprayed and I dont know if it will all wash off. Over half my fig trees are affected including 1 year old cuttings from local trees. Those parent trees to date, show no sign of rust. I have 3, 3year old trees and they seem to be somewhat resistant to rust. Rust is contagious as my figs are close together and it seems to spread. For next year use the forum search for rust, there are many comments.
bill e , Md