[yetibone]

Here's what was under the wad of bondo. Crunched all the way into the B pillar.
The resulting bag of walnuts was after a little hammer and dolly work. jhelgesen turned me onto the idea of using a smooth stainless steel disk on my grinder to help shrink the metal up a bit.

After doing what I can with that, I'll be priming inside and out in the next week or two.