I am preparing to stain my driveway and sidewalk. I am planning on using Valspar solid color concrete stain/sealer. I was wondering if anyone has any experience with this product for driveways. Also should I use the Valspar fast prep prior to using stain ( I have no stains or material to remove), or another product, or nothing but the stain? I the can says it covers 200 - 500 square feet, was hoping someone could give me a better number (would assume about 300 on average).