yes, from what I can tell ALL screws are exterior, they're the square head variety, and they are all rusted, and have leached rust all over the place, which makes everything look horrible. The only thing I've found without screws is the electrical plugin, it has very short staples that held it in. thanks for the link to the black rubber, probably worth replacing if it's not too expensive, seems easy to replace. How would exterior latex paint hold up on the interior? The paneling is in great shape other than where it rubs, but it's very sun faded and is a pretty outdated color. I was just thinking a light tan color would make the camper look larger and cover up the fake wood grain. I'm just glad the ceiling is intact and stain free. I've got a lot more questions, but this is a good start. I bought a tarp to drape over until it until I'm sure it's water tight.