[LWJ]

I have some experience here as a remodel addict. I have installed and sanded two floors and refinished three others. It is as simple as sanding and finishing any wood. The difference is that you have a much larger surface area. There is a floor finishing class that is offered through a local community college that I took. Very helpful. One night of how to info. Two critical issues that I see - first - drum sanders are very aggressive and will put small divots in the floor if you are an amateur. I have some currently. Not particularly visible but still there. For that reason, I suggest that your friend uses an orbital floor sander. Not as aggressive but almost impossible to mess up. Home Depot and similar places rent orbitals. The other consideration is wood variety. I currently have oak. It is the standard. I have done maple, hickory, and fir as well. A big caution on fir as it is so much softer that you really need to go slow. I would recommend an orbital for fir as well.

As for finishes, I have overwhelmed with any of them. Kitchens and dogs really wear a floor finish off fast.

Good luck.

Larry

PM me if you want to discuss further