refinishing hardwood: removing dark mark
I've been sanding down our stair treads, and I'm pretty happy with how they're coming along. The one area I'm struggling with is a dark mark on the landing that's about 12 inches long. It looks like someone tried dragging something up the stairs. I don't want to sand too far down, is there anything I could try? I'd love any suggestions!
Here's the address to the photo, too: