Hi all, I practiced law ages ago and seem to recall a limitation/duty to mitigate associated with damage to property but I can't find something that would apply to this scenario and could use some advice:

A group of people were renting a vacation home (with a security deposit) and the owner alleges that a countertop is cracked following the stay. The group disputes this, but for the sake of this question let's assume they caused the damage. The owner believes repairing a section of the countertop will make the whole thing look less than perfect (which is probably a fair assumption to a degree) and so they are insisting the tenants pay to replace the entire countertop, which is approx. triple the cost to replace only the damaged section. Assume the cost to replace exceeds the security deposit but the cost to repair doesn't (less than half of it).

It seems to me that the owner is only entited to the cost of repair and if they want to go above and beyond that's on them, but I can't find a relevant law aside from just general principles of wear & tear and other common examples (if you didn't think your replacement bumper was 100% perfect you couldn't make the at-fault driver buy you a new car, for example).

Can anyone point me in the right direction? State is Wisconsin in case anyone can find even more specifics. Thanks!