Cleaning

This spell cleans a dirt, stains or rust in an object you touch, such as a old rusty chain link, a dirty key with deep spots you can't get to, a stained cloak, or a warped  wineskin. As long as the stain or rust is no larger than 1 foot in any dimension, you mend it, leaving no trace of the former damage.

This spell can physically clean a magic item or construct, but the spell can't restore magic to such an object.