My wife and I got this 1973 Sunfish for our wedding gift to each other. It was used. We were married in 1981. The serial number is 33033. The deck had gotten pretty rough over the years. Thanks to this forum I tried rolling and tipping. Upon close examination there are some dust flecks and even though I wet sanded with 320 between coats, there are some swirls. I did two primer coats and three finish. I'm happy!