I have a customer who had the brick on his house acid washed. He said he could see that the brick company was continually rinsing down the brick and the driveway–taking care to avoid any problems. But after they left (a few months ago) he noticed the top sections of his driveway (closest to the house) were discolored.
Is it fixable (apart from jacking up the concrete)?
He said even if it could be lightened up some, he’d be very happy.
Notice in the one pic, the workers put their brushes down on a lower section of the driveway and it left marks.