How to paint a slippery deck and dripline in a hot, damp alley

[Jolene Adam]

I have a two-story mixed-use rental with decking (a long wheelchair ramp and landing) along one side. 

The deck is often damp, slippery in places, and mildews quickly. It doesn't get a lot of sun since it stands only about 15 feet from the one story house next door, on the east side. I am taking down a few small trees on my property to get a little more sunlight on the decking and reduce the moisture, and I'm hoping the neighbor will remove the bigger one on their side before too long, since it's too close to their house and will have to go eventually. The property is located about an hour from the Gulf Coast, so high humidity is common to begin with. 

It was painted/stained years ago, but much of this has washed off. I pressured washed a week ago and a lot more came off, so I'm at about 50/50 paint and bare wood now. I'm crossing my fingers that our dry weather lasts long enough so I can paint it before the winter rains really kick in. I'm thinking of Restore or Deckover with lots of texture, maybe in a dark grey to make the inevitable mildew less noticeable, and grit to make it less slippery.

Is painting the dripline on a dry afternoon good enough? It will definitely be wet again in less than 24 hours. Do I just put some towels down during the night? When the mildew returns, will the texture still give traction? Can I clean the mildew out of the texture in the future without messing up the paint job?

Thanks for reading!

Jolene