I hired a cut rate concrete contractor to redo my driveway because all the bigger firms were too busy. He did a decent job, but he did a couple things that I now need to fix since the chances of seeing him again are about zero.
First, he used red chalk line to mark his cuts on the slab-- it rained the next day and now I have red stains all over my driveway. I tried scrubbing with simple green and using a power washer, but the stains are still there. Is there any way to clean this?
Second, he was just plain sloppy when pouring the cement, and splashed the mud on the aluminum siding of my garage. How can I remove the cement from the aluminum siding without scratching it up or needing to repaint it?
Finally, he and left small rough areas on the already screeded slab where his "helper" walked on it and didn't re-screed. Can I use a sanding disk to sand down the rough areas on the slab?