I finally got back in the shop to continue the previously pictured rust which had been cut out.
After cutting the rust out, grinding/wirebrushing away the undercoating of an area and cleaning up any soundproofing of the surface, I can start to cut out a patch.
Large section of patch.
Then an approximate tracing of the patch area.
I start by cutting a larger than necessary piece and slowly trim it down to the approximate size.
