never use a pad that will scratch the surface i use 409 commercial strength degreaser from Home Depot its 9.99 for a big bottle. I let it sit basically respraying it all day long like 6 or 7hrs on a sat wipe sometimes to see whats left then take a razor blade and scrape every inch of top then...
I currently have a concrete slab patio thats 10ftWx20ftL. No roof. I wanting to add more living space to my home its concrete slab drops about 4 inches from house foundation. Also my garage is 18x20. It has a drop of 1.5 inches and slopes to 4inchs at the garage door. Either way I will need to...