I work for marina and the bottom of our gangway ramps have a diamond plating that has been previous painted with anti-slip paint, though this paint does not contain any aggregate. I've been looking at different types of coatings with aggregate - epoxy - but those require the surface needs to be stripped down to bare metal. I'm considering adding a course aggregate to the existing paint we have but I'm trying to figure out what size/coarseness of aggregate would work best. The paint in question is latex paint, not a two-part. I've used Shark Grip for wood on the docks but I want something more course for this location. I have considered buying sheets of material that have aggregate in them but they are costly, but may end up being the best solution. Any suggestions would be helpful.

My deck is about 2 feet (3 steps) above the ground. The space under the deck is open. Before the winter came, I laid the black-colored landscaping fabric underneath the deck, and 1-inch thick cedar mulch above the fabric. Is it an usual way people would apply to their deck? I thought it could control the weed in spring, but I also have some concerns about water stagnation, fungus in mulch, rotting mulch, animal hiding, or any other potential problem. Could anybody give me any suggestions, so I can make it better?