If your floor has any grease residue on it, you'll need to scrub/degrease the floor otherwise the UCoat It epoxy won't adhere properly to the floor. UCoat It sells special degreasers and solvents for taking care of these problems, but if you can't get those, any high quality, water washable degreaser will work. Once the floor is clean of grease and dirt residue, the next step is to mop the floor down with a muriatic acid/water wash. The acid wash neutralizes the alkalinity of the concrete and any cleaning solutions that may have been used to clean the floor. Using the supplied five gallon bucket, fill the bucket 3/4 full of water, then add 1/2 a gallon of muriatic acid and stir the solution lightly. Wet down the floor, then mop it with the acid solution. Rinse and repeat this once more over the entire floor. After that, soak up any standing puddles or water. Once that's done, mask off the bottoms of the garage's walls, and any other surfaces close to the floor that could get coating on them as it's applied.