I once had a new truck that was rust proofed with Ziebart, 5 yrs. later you could still smell the chemical every time you got into it.
The best rust proofing might be more frequent under carriage wash during winter. Those after market rust proofing service often requires drilling holes, ironically could allow moisture/salt get in. I doubt those thin-ish fluid spray would last long or effective at all.
The holes are capped.The best rust proofing might be more frequent under carriage wash during winter. Those after market rust proofing service often requires drilling holes, ironically could allow moisture/salt get in. I doubt those thin-ish fluid spray would last long or effective at all.
My 07V6 has been a Illinois/Michigan car. We have plenty of salt on the road. When I examined the underside (while spraying a can of Fluid film at various places) last fall, I was surprised to see how little rust (except exposed metal parts such as control arms/rotors) it has comparing with the cars I owned at similar age from the past.
Those after market rust proofing service might be indeed a waste of money:
You have to be careful with dealer's coating option.All amounts CAD$
Dealer (Honda) applied rust proofing was quoted to me at $1,000 (permanent). I negotiated that down to $699. I've had this on 2 prior cars and do not see rust for 10+ years - despite Montreal region having more salt than snow on the roads (so it seems).
They proposed an electronic widget that would apply a constant current to the car to prevent rust. (Similar to that used in bridge bases). I looked into this and (where cars are concerned) it is not a good solution at all. Honda also wanted $1000 for that - for a $200 (tops) widget....
Annual rust proofing (such as Metropolitan) has an annual cost and a certain downer in waiting time. A lot of people get it done in the fall, but really can be done anytime. $98.99 / year (plus tax). This does involve drilling various holes in the car the first time around. (I assume the "permanent" rustproofing needs holes drilled too....)