Well, water wetter solves the problem of corrosion. As far as radiators go, the one that OCWC sells splits up the water into little channels. I think this is the best way to go.
Use your dinner as an example. You've got these mashed potatos. They are INCREDIBLY HOT (never seen really hot mashed potatos before, but bare w/ me here
). Would it be best to stick metal pins in the mashed potatos and blow a fan on them? Or would it be best to spread the mashed potatos into a bunch of smaller piles, stick pins in those, and then blow the fan on them? Hehe. I love that example
.