c channels

Hello everyone! I'm pretty new here as I just acquired my first 60-series a couple of weeks ago, but I have some questions about the C-Channels on the rig. I'm wondering if I could get away with not replacing them and just de-greasing/metal-prepping/POR-15-ing them, or if they need to be...

While I was under my 62 on Sunday draining my tank to mess with the fuel levels, I saw my C channels are looking really rough. This side is the worst of the two, but the right hand side isn't much better. If the consensus is that these need to be done, I'll get a set and with any luck I can...