for what its worth
Add up your time and costs to strip.
I found that it was cheaper on both accounts...especially the labor....to pull the interior panels and replace them with new metal. 4 x 8 5052 was 33 dollars. Use the old panels for patterns. The end caps I had soda blasted. Then I came back and Zolatoned the caps. The new metal can be left un painted or done any novel way you want.
Your going to have to pull the interior anyway for wiring and insulation....something to consider.
"If it can't be reduced, reused, repaired, rebuilt, refurbished, refinished, resold, recycled or composted
then it should be restricted, redesigned or removed from production."