Bob,
We just had a new concrete driveway poured 5 weeks ago. We have a large maple tree next to it that of course has been dropping its fall leaves. I've done my best to sweep them off quickly, but the leaves are staining the concrete. It seems that the addition of rain only makes it a little worse. At the outset I tried scrubbing with a bleach and water solution and hosing it off. Now, I can't keep up with it. What should I do? Is this permanent? Snow will be coming soon. I can't keep washing the drive. Will I be able to have any luck treating it in the spring? Help!