Make your fibreglass surfaces shine like new with Salty Captain Gel Coat Genie Fibreglass Polish Compound. This polish eliminates light scratches, swirl marks and imperfections to improve the clarity and lustre of your fibreglass. It's a great option for many fibreglass surfaces, like boat hulls or the exterior of your RV. The polish creates a glossy, smooth finish, and it's super easy to use.