Shop here for Crystic Gloss Coat & Prime Coats, perfect for ensuring longevity of your fibreglass projects. The Crystic Gloss Coats are used to add a high gloss finish to a surface, typically on fibreglass or other composite materials, while a Prime Coat is a the perfect way to secure a great base to begin your work. Proper preparation of your surfaces is the ideal way to achieve a very smooth, glossy finish, and the Gloss Coat secures all your hard work in place.