Fibreglass Polish Extra Cut is formulated to produce a high gloss finish on old or weathered fibreglass gel coated or painted surfaces which require rejuvenation of the dull finish, and may be hand or machine finished. The abrasive contained in Fibreglass Polish Extra Cut will remove marks, surface scratches and imperfections and return chalky surfaces to as new. For new or unweathered surfaces, use Septone Fibreglass Polish Super Fine.