The inside structure of these consists of a tube (which is open to the elements, shown in pictures) and some reinforcing webbing that allows the weight to bear on the inner pressed 'frame' member and the rocker 'cylinder' along the bottom of the body. Try using the jack in each tube, and if you can lift the car without the tube inner webbing collapsing, which will be evident as the weight will push it upwards and start twisting the rocker outer skin, you're good to go for a cosmetic fix.
That would be a stiff wire brush chucked in your drill or grinder to remove all the rust and paint around each hole. Then treat the area with your favorite rust treatment compound, prime, then apply some rocker panel 'gravel guard'. Finish with spray touch-up paint. All this is well within your skill set, I assume, and not at all expensive. One trip to the local body shop supply should get you all you need for under $50.00.

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1986 560SL
2002 Toyota Camry
1993 Lexus