Once you've focused on cleaning the worst spots, utilize a hose to have the full area damp. Periodically sprinkle the etcher or cleaner/degreaser evenly round the total space and scrub The full floor utilizing your brush. Etching the concrete will give the epoxy an even better floor to bond to. http://angeloaaxur.jaiblogs.com/13880992/a-review-of-epoxy-floor-coating-contractors-chicago