well i spoke 2 my family friend who works for honda about it. i havent actually decided when i wanna do all this though, i need to buy the wires still to reach the rear roof middle. well anyways to answer ur ? i think it is painted underneath, but there's probably a hole. imma probably seal it with suttin. im not sure yet. i have yet to plan how imma do that. b/c right now my priorities are sound system, then wheel/tires.