[Gerry Zagorski]

Woody wax is not slippery. Once you get the deck clean, spray with a fine mist of water, squirt some woody wax on it, work it into the non skid with a deck brush, let it dry completely and hose it off..

It's not going to last more then a few weeks but it's so simple to apply you can do it as often as you need to...

You can also use it on regular fiberglass as well as anodized aluminum. Here you wipe it on, let it dry and and buff it out with a soft towel.