How hard is it to resurface a hardwood floor?
Not that difficult. Just dusty and time-consuming. Definitely get the orbital sander, not the regular one. It will take longer, but your chances of messing up the floor are far lower with the orbital. Close off the room from the rest of the house with tape, plastic, etc. Wear a breathing mask. Put a fan in the window, blowing out. This will help get rid of the dust. Before putting down the finish, wipe the floor down with cotton cloths and denatured alcohol. This gets the last of the dust, does a good job of cleaning and doesn’t raise the grain. We used Cabot polyurethane with very good results.