A process for repairing a marine surface is provided that includes the mixing of the part A and the part B until a terminal color change occurs within ±5 minutes of cure. The mixture is applied to a substrate of the marine surface in need of repair to a thickness of up to 6.35 mm. The cured mass has water absorption less than of 0.2% in freshwater or 0.15% in ocean water salinity. A marine repair composition is provided that includes in a part A: an unsaturated vinyl ester resin, a reactive diluent, a cure promoter, a cure inhibitor, a corrosion inhibitor and a filler. The part B includes a free-radical cure initiator stored separately from the part A until mixed with the part A to form the composition.