Photographing completed projects months and even years later can help you show how your work stands up over time. This picture was taken 10 years after the acid stains were applied. The stains mimic the slate colors in both color and (matte) finish.
Flawless concrete is rare. Educated customers know that contractors cannot guarantee polished concrete floors free of imperfections. In this case, the contractor used colored crack filler to turn a gouge in the floor into a design pattern.