In an acid etch, a weak acid is applied to the concrete surface. The acid pulls up the first layer of concrete. Wood adds that it is important to wash off the acid etch and let the surface dry ...

Crew members got down in on their hands and knees to rub scrub the gelled acid into the exposed concrete with 2-inch paint brushes. “As we etched across the lobby floor, each worker had a ...

Walkways being prepared for water-based stain can be prepped with a standard scrubber, but concrete destined for an acid stain will need a different approach. This scenario requires etching ...