Eastwood's Fish Eye Eliminator has been designed to rid fish eyes or cratering in urethane finishes. Most flaws in the finish are caused by contamination, most often in the form of silicone, water, oil and/or grease. A defense against fish eyes means you need a properly prepared surface and clean work environment; however sometimes, despite efforts to keep things clean, contamination still appears. In those situations, Eastwood Fish Eye Eliminator goes a long way to ease surface tension and allow the coating to flow properly. One 16 ounce can treats 16 gallons of sprayable paint.