Now I have to come up around this trunk floor radius.
I got the can opener out and pealed back the trunk floor skin. removed a chunk that had rust holes and pealed a solid piece open for more room to work from the top side.
I cut the thin brace metal back to solid edges, prepped for welding and fabbed a tricky piece of channel which I notch cut for the radius and then I fit it from inside the trunk. It worked out pretty well.
Tomorrow I will fab the ends for this mid trunk floor brace and install them from inside the trunk. Then I can patch the 4 or 5 Rusted areas in the trunk floor skin and move on to the next problem area.