There was some glued completed flooring, but It will probably be sanded so it should be clean Any oil or grease spills? Not that I’ve witnessed. I've a 10 calendar year aged garage floor down the NJ shore close to the ocean. Humidity is significant and water seeps in (not https://epoxy-flooring-average-co04691.alltdesign.com/epoxy-coatings-for-garage-floors-secrets-60510131