These cleaning erasers work wonders! They're extremely versatile and mostly durable (they begin to crumble apart a bit after scrubbing for a while). They are unscented (a good thing!), and they're extremely effective. I just dampen with water and rub across the walls and wooden doors, and suddenly, like magic, every old stain and mark just disappears. This product is phenomenal! It doesn't last very long, but while it does, it works incredibly well to clean a wide range of surfaces.