Restoring hardness on an animated minion

Spent some time looking and I don't think this question has been asked before, so maybe I'm missing something.

The Animate object ritual lets you make a permanent minion out of an object, like creating an Animated statue.

All animated object creatures have hardness and the Construct armor ability:

Construct Armor Like normal objects, an animated statue has Hardness. This Hardness reduces any damage it takes by an amount equal to the Hardness. Once an animated statue is reduced to less than half its Hit Points, or immediately upon being damaged by a critical hit, its construct armor breaks, removing the Hardness and reducing its Armor Class to 15.

However, there is no mention anywhere that I can find about how/if this hardness can be restored later? Reasonably I would think, a crafting check to repair it to full health again would restore hardness. But I can not find this mentioned anywhere in the rules about repairing or hardness.

Are animated minions just one and done and become significantly less useful if they are ever crit or below half HP, or am I missing something?