rusty

adj. oxidado, aherrumbrado, mohoso

Mohoso. Cubierto de moho.

oxidado, mohoso, carente de práctica, inexperto (vernacular)

robín, robinado, herrumbre, oxidado

(adj.) = oxidado
Ex: This is a a guide to web resources on cleaning and hygiene, answering questions such as What do you want to clean -- your hair? your carpet? your rusty lawn furniture?.
----
* rusty brown = marrón óxido

(adj.) = olvidado, falto de práctica
Ex: Adults who have chosen to interrupt their educational careers often face the problem of rusty academic skills.
----
* get + rusty = estar falto de práctica