Thanks for all the replies. Much appreciated. Over the many years I've owned this place, I've only once deducted minimally from the security deposit because a tenant left an extreme mess. I wanted opinions because I don't want to do myself a disservice as I can be an overly attentive landlord and like my tenants to be happy.
I've had several floor guys tell me this is the floor can't take another sanding..because the floorboards start to crack as they've been thinned from multiple sandings...it's also pine. I like the screening idea. Replacing the flooring may be the move. Because of the neighborhood and the historic appeal of the house & apartment, LVP could diminish the appeal, believe it or or not. I'm kind of a purist, but I'm hesitant to put in an all new floor (pull up the old ones, level the new wood flooring on the beams) because A) It's expensive B) it's a loud, big job and I have tenants on the floor below. The tenant in question moves out in June, I'll update you all on the final outcome. Thanks!