Acid-stained Concrete Patio -- Looks like copper! Click the pic for a brief how-to video on doing this technique. I'd love to do this, although I wonder if the acid stain is bad for those plants around the patio.
DIY How to stain a concrete floor using acid-based stain! This site (by DIY-ers) has the most thorough & easy step-by-step instructions I've seen yet. Be sure to read *everything* on this site, as they perfected their own stain formula for quickest applic
How to Apply an Acid-Stain Look to Concrete Flooring
Applying acid stain to a concrete floor can add dramatic marbling and give a depth of color not available in any other type of floor. These step-by-step instructions show DIYers how to obtain great results.