I had rust and daylight around the right front jack port. Used POR 15 as described above and welded a solid overlay of rocker panel from a junked body (obtained from Brian Toscano-thanks). It extends above/below the jack port about 2", and foreward/back from it about 6". The new overlay is welded to the outside of the hollow rod jack port and all around its periphery. Only ground the welds smooth-no body filler. Finished with off the shelf shaker can rocker panel paint. Repair not obvious unless you know its there. Have jacked the car using both the port and the pad beneath without problems, so the fix is also structural.