 You could use a porch and floor paint, but I really, the solid color stain that's used on decks, you're going to at least double the lifespan of a semi-transparent. Now there's sometimes on decks, people don't want that painted look. They want that, I want it to look like a wood floor look and that's fine. But on a dock, maybe cosmetics not as important, but protection is more important. And that's why I'd recommend that.