CommunityRemoving a Rust Stain From a Concrete Driveway

Removing a Rust Stain From a Concrete Driveway

How do I remove a rust stain (probably from rebar) from my concrete driveway?

The Money Pit Answer
Try using trisodium phosphate, or TSP.  It's available in the painting aisle of most hardware stores or home center.s  TSP has a paste-like consistency.  Brush it onto the stain and let it sit.  If anything will pull rust stains out of a driveway, TSP will.  The only drawback is that the spot might end up brighter than the rest of the driveway, because TSP has a bleaching effect.