Remove trash, grease, dirt, loose paint, etc. using a scraper, degreaser and a pressure washer as needed.Let the container dry completely before paintingUse an angle grinder with a wire wheel, or a needle scaler to remove all loose materials and to expose solid metal.You do not need perfectly bare steel unless corrosion is severeMask areas you don’t want painted using tape and plastic sheetingCover the wheels, reflective tape, serial numbers, hinges, and any hydraulic parts.