Epoxymaster product -- Excellent Surface Prep -- Excellent. Two year old slab, (14'x24') clean with broom finish. Used etching solution supplied with kit and wire brushed local stains. Application -- Good-Very Good. Had some difficulty with uniform application of the epoxy. Didn't pre-fill/seal expansion joints and lost material in the joints while spreading. Got a bit thin toward the end. If I had a do-over, i'd fill the expansion joints before starting and be more careful/skillful with the notched spreader. Also, i'd get the spiked shoes. Overall -- Very satisfied. Super smooth and glossy. i'd use this product again.