Continued with the wire brushing and rust converting paint today on the underside of the body. Got back as far as the front edge of the rear seat area today.
The inner part of the rocker panels were NEVER painted by GM. (They didn't dip the bodies back then.) Even so, they were remarkably rust free when I painted them.
Naturally, I already see a spot I missed. Ah well, there's always next weekend.
Bill the Engineer