I have a customer that has had a pool for about 8 years- the concrete is unfinished. They want me to put stone pavers in outside the concreted area- approximately 2400 sq. ft. of 'georgia blend' holland pavers. Its a dark red/dark grey mix stone. They want to stain the concrete to match. I probably won't attempt the staining myself, but I'd like to get ideas on what is involved in that, what it costs, what are some good stains, etc. Thanks!