A crystalline lattice threads through the structure of a Small or smaller object that you touch, making it immune to all damage and it cannot otherwise be destroyed until the spell ends. This reinforcement does not impede the object’s ability to move or flex, nor does it enhance it beyond its additional durability.   For example, armor targeted by this spell does not grant an increased bonus to AC, or reduce damage taken, but it is immune to all damage and cannot be destroyed by features such as a rust monster’s Rust Metal. Similarly, a rope becomes indestructible for the duration, but can be tied or untied as normal.