Last fall, we built a large screened porch on the back of the house. I would like to acid stain the floor...I have seen many pictures and like the look of it. Does anyone have any experience with this? Is it a difficult process? And do I have to buy templates to create a "tile" look? I have heard that I need them, but found a website that says I can just use painters tape to make the "grout lines". Any info helpful.... Thanks!