I had the abrasive product first, works very well, even fly legs slip on this surface. Rain streaks can be easily wiped off. The surface of the boat (GfK) is protected for at least 3 months. However, an instruction leaflet should be included, which prescribes the absolute use of protective gloves in significantly larger font. The effect of nanoparticles on the skin is still not known with certainty. All in all, recommended, but please follow the instructions.