I am close to finishing a stream and pond project. We have a BUNCH of gray basalt rock in our area which I used a lot of in this project, but mixed in better looking rock too. My wife would like to use a "wet look" sealer on the rock above the waterline. I so far have found Behr Wet Look sealer and have heard Thompson's water sealer works good too. Are there recommendations on product that works best, or is there anything I should be aware of about doing this?