As mentioned before, I have two spots on my F250 where the frame is rusted pretty bad. While the rust is bad, it still drives fine and is in no danger of breaking in half or anything like that anytime soon. I was considering 3 options, which would be the best? I'll be pulling the fuel tank down soon to do the 7.3 Hutch mod to the fuel tank, so I'll have complete access to the drivers side rust also. I was thinking of spraying down the rusted areas with either Fluid film OR used diesel oil cut down with diesel so it wouldnt be too thick, with a potato pump every 2 months or so, or I was considering grinding off the flaking rust and coating it good with POR 15. which would be thee best solution?
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