How to rid nail polish from wood floor?

Since you want to finish it you probably don't want to gouge the wood. I would recommend trying to grab them up with needlenose pliers first, then using a pair of vice grips to hold the nail and give you something to grip with a pry bar. Remember to put something between the pry bar and the floor to prevent marring of the wood with the bar. If you can't pull them out punch them in and hide the hole with some putty. Use a belt sander with aluminum oxide paper and grind them down smoothe to the surface of the wood. They will add charachter to the final result and be flush to the wood as not to snag or poke you. just remember to sand in the direction of the grain and not against it.