We just had new hardwood flooring installed on the first floor and stairway. Unfortunately, our dog has slipped and fallen down the stairs and scratched the polyeurethane. None of the scratches seem to have gone deep enough to reach the stain but there are a couple of scratches in the poly. We plan to install a carpet runner on the stairs but I wanted to know if there is a way to "fill" the shallow scratches in the ploy before I cover the stairs with the runner. It's a dark cherry finish.