I would like to have some help with learning what to do to refinish these floors. I did not want to have to start all ove again. But, the original floors don't have stains, but have some area's where my grandmother had some rugs on them before they were carpeted. Can I lightly sand them and use the pollyurethane that I have read about, that you can just put over and it stains and seals at the same time. Have I misunderstood about this poly. ? Just Help Me. I am trying to find a quick fix until next year if possible, that I can accomplish myself.