My wife and I purchased a new home in March. It was identified the front pourch had a discoloring in the concrete. The builder has given us three different options. 1. Cover it with texture-crete (without a design). 2. A Concrete Stain. 3. Use a Skim Coat. We are interesting in something that goes with the house, not changing the overall appearance. I have no clue when it comes to concrete. Any help into this would be great. Thanks for the time.