Scholl Concepts M-Extreme Cutting is the most aggressive compound in Scholl’s new marine range, expertly designed to restore weathered gel coat surfaces. It effortlessly removes scratches and sanding marks from grit P1000 and finer. Once the aggressive cut is complete, finish with Scholl Concepts M-Universal for a brilliant, glossy marine shine. Perfect for restoring even the most weathered fiberglass and gel coat finishes.