I tried cleaning the paint, but alcohol wouldn't work and I realized that the damage would be obvious even if I removed every bit of paint, so I ordered a new front case and jack.
This is the old input jack receptable in the new front case, showing that the jack is what is crooked:
This is the new input jack receptacle in the new front case, showing everything lined up well:
Soldered the jack and put it all together. The middle one is the new case and new jack. The one on left is another 87V I have for comparison. Tne one on the right is the old front case and old jack:
Did some testing and 87V with the new input jack receptacle works great. Tested V DC, mV DC, Ohms, continuity, A DC, and mA DC, comparing one 87V to the other. No issues found.
I'm impressed with both how rugged and how repairable the 87V is.