After removing seats, the next step was to rip up the rubber flooring in order to expose the plywood subfloor. Upon seeing the rotted condition of the wood, it was obvious there had been water damage, and that there could be some rust issues. In a project like this, it's important not to cut any corners, so we tore up the subfloor and took Eva all the way down to her metal frame in order to start from scratch.
At this time we also removed the metal siding on the walls. This tedious process involved drilling out each rivet with a drill bit that was slightly larger than the center pin hole, and chiseling the head loose.