This phenomenon is due to deposits of minerals because these boards come from an early production lot. On the rest boards of a production lot, there is more lubricant, and this leaves an invisible layer of oil. This layer of oil reacts with the sun, which leaves a white deposit on the surface. The boards are not defective, it is a normal phenomenon in the composite. Just apply the composite deck cleaner “EZDECK CLEANER” to correct the situation.
Apply the product with a sponge on the white boards in sufficient quantity to keep the board wet for 30 minutes. It is not necessary to rub the board, just extend the product with a little pressure. Wait 30 minutes. Rinse with water.