Enough of the post mortem....
Next, I pull the driver's seat, the center console, and the front door panels, then it's clean clean clean, and clean some more. Weld up the wheel wells. Then it's all getting painted kaki - just paint on the top, and some sand Durabak over the floor - for under the carpet.
WELD UP THE WHEEL WELLS!!!! Brave Brave Man.

Good Luck