The corrugated deck of my 40-year-old Beneteau tends to turn gray, but can always be brushed up with sharp polishing polishes, but after a relatively short time the grooves and pores become clogged or the wax traces that have not been sufficiently polished off appear as floury streaks. The Yachticon deck wax was used for the first time and has surprisingly proven itself extraordinarily. It is easy to work with because it is liquid and colorless and, above all, resistant to dirt. During the season, the "fallout" (bird droppings, footsteps) can be rinsed off with ease. Even at the end of the season, the deck was still perfect! Definitely recommendable!