This is an acid-stained concrete basement floor. Note all the paint that had to be removed prior to staining. It was done without damaging the concrete surface by using a grinder fitted with a "Zec" sanding disc. The floor was then stained with Decosup Chemtone's "Redwood". The color took beautifully, and a solvent acrylic concrete sealer and water-based floor finish were used to protect the floor.