Next, several samples of stain were applied in the utility room area to experiment with the color and get the shade we were looking for. Originally, I had planned to use a soy-based stain called Soycrete, but this product was not penetrating the polished floor very well during our test samples. In the end, we went with a more traditional acid stain instead. The adobe-colored stain was sprayed onto the floor, worked in with a brush, then allowed to penetrate overnight. The next day, I washed the floor with a baking soda/water solution to neutralize the reaction, then went over the surface one more time with a 220 grit final polish. Done!