This is basically what I've done so far: I sanded the floor down to 120 grit with a drum sander (did a pretty good, time consuming job) Put 1 coat of polyurethane down - these problem-spots soaked ...
I'm planning to rent a sander and refinish the ugly floor that is the darker floor in the photo. I'm also planning to pull up the carpet which has nice hardwood under it in good shape (no refinishing ...
I am planning on reusing some old hard wood flooring reclaimed from another parts of the house. I should note I have an old house that the original portion was built in 1760 with an add on done ...