This fast-cutting compound removes heavy oxidation, scratches, and other defects. Use 3M Perfect-It Gelcoat Heavy Cutting Compound for any P800 and finer scratches. Its improved formula has longer wet times for easier cleanup and less dust. Plus, this formula works better in warm climates and allows you to use less material than before. Cuts through heavy oxidation, scratches, and other defects fast Removes P800 and finer scratches Great for marine, RV, and industrial gelcoat surfaces Stays wet longer so operators can use less and see easier cleanup