Once your floors have been sanded, they need to be finished. A full discussion of the available finishes could easily fill its own ideabook, but here are a few points of conventional wisdom: An oil finish may be more durable, but you will have to cope with odors and VOCs when it is installed. The glossier a finish, the better it will hold up to traffic. Of course it will also show that traffic much more than a matte finish. Polyurethanes, the most popular floor finish, can't be touched up invisibly, so you have to refinish once the wear gets too bad.