Large scale offshore wind farms are being planned globally and there is a general trend that the size of wind farms, with the installed wind turbines in each farm is becoming greater in number. High build-high solid protective coating is a robust solution to offshore structures splash zone anti-corrosive protection. The importance of coating thickness building-up during application is vital to secure the long-term protection. Furthermore, to have an efficient manufacturing process, application and curing speed is also becoming critical. In this regard, unsaturated polyester coating with outstanding application and turn-over efficiency delivers extra value to both customer and applicator, where the cost of coating, time, and application resources are extremely important. In this work, curing kinetics of unsaturated polyester coating is studied using Fourier transform infrared spectroscopy and Rheometer to evaluate consuming rate of reaction and the cross-linking. Dynamic Mechanical Analysis is utilized to study the glass transition temperature, also to align the storage modulus and hardness development in dry film. In doing so, we have carried out both microscopic and macroscopic mechanical analysis to eventually explain how and why unsaturated polyester coating delivers unique value to faster manufacturing for offshore windmill monopile industry. Knowledge gained in this study is beneficial for the fast-growing offshore wind and sustainability.