I Have The Same Question
I noticed on the smooth fiberglass deck, that first coat of wax works great at keeping the deck "easy to clean" for the season.Unfortunately, we are not suppose to wax the "non-skid" surface so, because it has not been "sealed" it almost acts like a dirt magnet.I am hoping there is a product available that can be put on the "non skid" surface.If not, I will try waxing a small section of "non-skid" surface with a brush and then brushing off the wax and see if this make a difference.Wish me luck and if anyone knows of a product, please let me know.Thanks, Bob