How many coats of polyurethayne for hardwoods?

How many coats of poly for hardwoods in a rental? I’m thinking 3 or 4. Any insight will be appreciated.

I use two coats of the minwax poly and a top coat with the Varthane diamond strength oil base. I also warn the tenants to put felt under furniture and rubber undermats under the carpet rugs or they’ll pay for the damage.


See what it looks like after 3. Each coat makes it look better.