Originally Posted by Zybane
I know new vehicles like the WK2 chassis gets an anti-corrosion bath on the assembly line. Is it worth spraying the underside after delivery anymore? I did this on some of my previous vehicles, not sure it is needed anymore. Thoughts?
My understanding is most automotive manufacturers use electro-galvanize steel panels as the primary rust control system. Frame and body panel steels arrive with the thin coating applied.
For many parts of the world this is sufficient and further rust proofing is not required. However where salt/sand is used on the roads further rust protection is not necessarily a bad idea. Rock chips can penetrate the coatings and expose the steel to whatever is next to follow. Overtime this can lead to rusting on the panels that take the most beating.
Ultimately my suggestion would be based on how long you plan to keep the vehicle. 6 years or less, I wouldn't bother. Anything more and I would be adding a backup if I lived in a rusty area.
My Overland is 7 days out (I hope, been pushed back once already). I will be adding rust proofing within days of pickup.