I asked this question before to no avail. I will try again. I pickup my 2014 Cayenne Diesel mid July. I want to rustproof (Krown).

I live in Toronto

My wife owns a 2007 Acura MDX that was purchased Aug 2006. It has been rustproofed by KROWN annually. As of today the MDX literally looks showroom brand new**I get professionally detailed every spring as well**. Not a sign of Rust. I see Beamers Audis older Porsches all the time with little rust 'runs' as i call them and the cars look...well....old. Anyone here who live in winter climates that get their Cayenne rustproofed? and if not how long have you owned?. Its not about "will you get rid of before it rusts? it wont rust in first 5 years..." Its about having my Cayenne look 'showroom' as opposed to 3 years 'worn'. The salt these days in Toronto Canada is off the charts bad. Cars literally coated in white all winter.

or simply put is it a waste of money. Galvanized reasoning doesent cut it as most cars are galvanized these days...and still Rust. Thoughts?

 

When I picked up my Cayenne earlier this year, my dealer told me to not rustproof it (he was quite emphatic) because it's already been done. But I'm in Toronto too, so I wouldn't mind hearing the opinion of people who've had their vehicles for longer..

 

I live in New Hampshire and they use just as much salt. With cars being galvanized, etc., I don't think you need additional rustproofing. The key is to wash the car at least once a week in the winter, including the undercarriage. The cars you see on the road with rust runs, etc have been neglected, and unlikely to have been helped by aftermarket rustproofing. Remember, not all nice cars are owned by car guys!

 

I have an MDX that is fully rustproofed, but spent most of it's life in the Northeast getting battered by road salt.

Nothing is rusty that would be considered a structural issue. However, there is a lot of oxidation and surface corrosion on parts, making them look chalky. Also, on the edge of body panels where there are seams, there are spots that have very light rust on them. They are not rusting through, I change my own oil and am under the car all the time. They appeared immediately and have not gotten worse in 6 years.

I would say structurally, it's a waste of money. However if you want the undercarriage to always look brand new and pristine after washing, then do it. It's your money, spend it how you want. But keep in mind, that's the ONLY reason to do it.

 

There's a lot of heat shielding/foil insulation under there, enough to make me think aftermarket undercoating would be unwise. Plus, the poly wheelwell liners are already rust proof. I recently got a good look when mine was on the rack for its first tire rotation. Having taken delivery in late August, it's already seen the four seasons. Yet the undercarriage was surprisingly clean. That said, brine is used on winter roads here, as opposed to rock salt.

 

surface corrosion? you had rustproofed?

My wifes MDX literally looks 'showroom' brand new with KROWN. What kind of rustproofing did you do????

I would say ANOTHER reason to do it is resale value as NO ONE wants surface corrosion...no one.....I havent yet heard a good argument against rustproofing and im not buying the 'no need to rustproof' argument. I guarantee 100% that a Porsche Cayenne in Toronto after 4 years without rustproofing will have rust 'runs' and look shabby COMPARED to a rustproofed Cayenne of the same age.

 

Krown 'oil' spray would have zero impact on shielding/foil insulation. ONLY TAR based rustproofing would cause this problem Its 2013 i cant even find a TAR based rustproof anymore

 

4 seasons? a dodge ram pickup can make it through 4 seasons without showing rust!!!!!!!

try 16 seasons in Toronto

 

I am only looking for replys from people with 'eastern' seaboard winter conditions

 

I drive my CTTS in almost all of the NE winters and I am neutral on additional rust protection. The Cayenne unibody is double galvanized dipped and comes with a 10 year warranty on any part failing due to rust

After a couple of rough winters, all I have noticed is a light rush oxidation on some random parts like control arms and axle half shaft clamps. Must less than I would have expected and I perform all of my own maintenance and mods.

I am sure it probably wouldn't hurt, but not sure if you will see the value within a reasonable time frame.