RaYMaN: Your infernus has a messed feeling, just like a rusty and old car should look like. There's not much to say. You placed well each thing you made for that skin, except for that hood, which has nothing to do with rusty IMO, also those blood (i think its blood) splatts were pretty Low Resolution. Those messed the hood and your skin's side.
As for Sedative's, his skin is pretty messed and it doesnt really look a rusty car, its more a scrap metal. I think you exagerated on the oxidation. Also i dont think a rusty car has a "clean" part and a totally messed one, there were some parts of it that made me think "So, this owner can't take care of the whole car, so he only really care with a few bits of it", also, I dont know the whole default dff [As i usually skin at any custom ones] I can't say if you can or not edit each part for itself. Can't say if you followed the rules strictly.
My vote goes to: RaYMaN