Originally posted by snd84318i
[b]The problem with rhino liner is that any sort of rust already on your car will be "sealed" under the sprayed on liner just eating away at the unprotected metal. I guess it might work for a newer car, but why go through the hassel if a proper oil underspray only costs $90 @ Krown?
Just curious... if I'm not mistaken rust oxide requires oxygen as it's prime inhibitor to take place.
*thinking back many years*... correct me if I'm wrong anyone:
Water is an electrolyte, when it hits a metal (iron) it combines with carbon dioxide in the AIR, making a very weak acid... (though a stronger electrolyte). The acid disolves the iron, and the water breaks down to it's component pieces... (h2o) Hydrogen and Oxygen. The oxygen binds into the metal, hence creating an iron oxide.. (aka RUST.)
For those who are curious----the reason salt makes a car rust quicker is because the combination of salt in the water makes again, an ever stronger electrolyte / acid... it speeds up the process.
With all that said, as long as the bottom is thoroughly dry, and you apply the water & air tight rhino-style liner, I don't see how rust can form or continue to flourish. The only thing I'd question is if your muffler and such can release heat as effectively... and if you ever have to unbolt anything, it'd be pretty tough to do with that liner over it.
Correct me if I've made any errors anyone...