Next session, I worked on the fold area a little more with a hammer (off dolly) and a "slapper". This helped smooth it out "locally" but there is still a "macro" profile problem to address:
I then started sanding with a block to ID other "opportunities" and found several. I hope to go after these one at a time.
Here's a section with some "ripples" and a larger depression:
Here's a tear I will have to weld:
...along with this spot weld rupture:
