I spent the morning yesterday stripping and cleaning the trailer. Then I convinced my roommate to help get the rust sealing paint on. I didn't realize it would take so long to hit all the corners and small spots, but 7 hours later it was complete.
There will be a small hiatus from angle grinding starting now.
After stripping all the random wires, gas line, metal tabs, screws, plywood, sheet metal and flaky rust, we applied POR 15 (crazy auto paint that adheres to rust).
With the foundation sealed, the next step is framing the floor!