Acid reacts with the concrete to produce a mottled effect that can look fabulous but is hard to control. Water-based stains give a more consistent finish, and there's a greater color choice.

Stains come in many different color options and finishes, but there are two ... Water-based stains essentially dye the top ...

If you’re looking to finish an exposed pea gravel placement of concrete, you can use a surface retarder, sugar water with a sprayer, or return after a couple of days with an acid wash ...