Nail holes with black rims

Q: we are redoing oak hardwood floors in a 1959 bungalow. When we do this we will be removing a small floating closet that will have nails through the floor. How do we remove the black marks from around the nail holes before we fill them?

A: Those black marks may not actually come out. If they bother you excessively, you could punch down or recess the black area and fill with wood filler.