Like many others I have read, we recently removed the '70s carpet from a vintage 60s hardwood floor. It is in pretty good shape, but on the staris there are "marker" lines from where the carpet layer drew his template. We know that we need to refinish the floors, but can't attack it at this time. Any suggestions for how to "remove" the marker? Also, the arear is front of the bathroom is almost gray from use - any suggestions for a good cleaner and temp. finish?