fireproofing or paint overspray lands on exposed retail duct retail grocery fireproofing overspray exposed duct paint overspray grocery retail spiral cleanup stop aggressive cleaning until the duct finish and contaminant are identified. protect adjacent work, document the affected area, and use the project-approved cleaning or restoration method. the exposed sales-floor duct has fireproofing overspray on the visible side. i identified the finish and photographed the area. what approved cleaning method do you want used, and should this run be protected before spraying resumes?