Areas that rust - Front jacking points

This is the sliding door(more difficult) side . 

You can see the door-runner channel bottom, the cut and bent-back jacking frame (almost essential for any repair in this area, or cut it off altogether) the front main shear-web (panel behind the front wheel) with a few perforations.

To get to this state, a good few spot-welds need to be ground or drilled out (preferred method), and the rusty lower-sill, outer side sill cut away, right back till the metal is good and back to normal thickness from wafer thin...