rust
Here in indiana they rely heavily on salt because they do'nt like to plow. I have had no problems with rust yet. the frame and undercarriage have some "surface staining" but rustproofing won't fix that as I recall they don't do the moving parts. no sign of body rust as of yet, i check regularly. Its probably a good idea, but does it need done urgently, No. Plus my research has shown that most rust begins at the union point of metals, especially dissimilar metals, like steel body panals with aluminum bolts. The rust proofing while providing some protection does not penetrate deep enough to reach these union points unless done during manufacture. this is what the guy at the body shop told me, further investigation at the rustproofer proved it. Just look at the warranty, most don't last that long.
:_drool: It's all fun and games until it can't be fixed!