I live in the rust belt and I have seen just about every attempt to rust proof the bottom of cars.I’ve been meaning to post a thread asking this question….
a local shop (another local shop “sprays undercarriages”, and I think it’s just an oil spray, it was $100-180 and they over sprayed on my jeeps bumper) will treat the undercarriage, pull everything off the frame, roll it on… they say it’s the same treatment they do on bridges (isn’t saying much, America had some rusty ass bridges), but it’s $1,500.
worth it?
The ONLY thing that seems to moderately work is
1) Keep it clean. Wash the salt off it.
2) Super light coating of Cosmoline. Similar to what they spray on the bottom of BMWs and those seem to hold up pretty well.
I would never have a company do any kind of "coating" to the bottom of a vehicle. Those seem to trap in moisture more than prevent it.
My good friend that was always into Toyotas just crawled under his truck after winter, gave everything a good washing, scrubbed off any surface rust and hit it with some epoxy primer. Seemed to work ok.
Sponsored