Q: An area rug and padding was removed from my hardwood floor. A mark has remained where the edge of the padding was. How can I rub this away without ruining the finish?
A: This sounds more like the effects of sun bleaching than anything else. Sanding may be the only way to eliminate it, and sometimes even that won’t remove it totally. If you think it is a residue left from the pad itself, and this floor is finished with a varnish or polyurethane, you may try a good polyurethane floor cleaner such as Bona Pacific floor cleaner.