Assessing damages to floor against security deposit

[Thor Camargo]

Had some tenants that used a plastic carpet protector on wood laminate floors. The plastic had spikes on the bottom to keep it from sliding, and those spikes ended up digging divets into the laminate floors.

I assume this goes beyond "normal wear and tear"?

As for assessing damages, I had a flooring company come out - they said that because the planks were "scraped" to give the texture of wood, they couldn't just sand those planks down and refinish them. They said they'd just recommend replacing the entire wood floor on that level of the home.

How do I assess the amount to charge against a security deposit in this kind of scenario? Is it a flat % against the total cost to replace the floor? Or do I need to keep trying different companies until they give me the cost for a direct repair on only the damaged area?