A gentle lesson on terminology for you here... the "topsides" of a boat is the area between the waterline and the deck edge - ie the surfaces of the hull itself above the waterline.
I thought that was Freeboard. I thought topsides was anything above the hull deck seam or above the gunwale. Anyway, you are correct. I should have just said deck.
Banshi, that looks very nice. It does appear that we may have a different type of molded non-skid. Mine is almost like mini diamonds on end all compressed together. Probably 1/4" deep and rather pointed on top. Actually can be uncomfortable with bare feet.
When I attempted to paint it, the paint tended to level itself into the recesses of the non-skid and expose the points. Plus each little recess between the points ends up with a different level of paint so I looks rather sloppy. Perhaps as suggested I should just sand out the texture and paint it with interdex.