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Preventing Rust in Fender Wells #4714989
04/03/18 10:08 AM
04/03/18 10:08 AM
Joined: Dec 2017
Posts: 2,503
SE British Columbia, Canada
Snagglefoot Offline OP
Snagglefoot  Offline OP
Joined: Dec 2017
Posts: 2,503
SE British Columbia, Canada
Im always amazed at how many trucks are out there with rusty fender wells. The remainder of the truck is usually just fine. While new trucks are coming out with plastic liners, what type of treatments seem to work to prevent the fender well rust on older models of trucks and cars. Thanks.


If you want the job done right......do it yourself.
Re: Preventing Rust in Fender Wells [Re: Snagglefoot] #4714994
04/03/18 10:12 AM
04/03/18 10:12 AM
Joined: Dec 2006
Posts: 7,770
Toronto, Canada
KrisZ Online happy
KrisZ  Online Happy
Joined: Dec 2006
Posts: 7,770
Toronto, Canada
Since you're in Canada, a can of Rust Cure from CT works very well and the included straw makes it easy to reach hidden areas. It sprays pretty far too.


2015 Dodge Grand Caravan-27k miles.
2006 Mazda 3-163k miles
Re: Preventing Rust in Fender Wells [Re: Snagglefoot] #4714999
04/03/18 10:18 AM
04/03/18 10:18 AM
Joined: Jul 2014
Posts: 366
Ceciltucky Maryland
Oldtom Offline
Oldtom  Offline
Joined: Jul 2014
Posts: 366
Ceciltucky Maryland
Fluid film works great and creeps long dstances. The tailgate on my old Toyota was rusting thru at the lowet corner. I removed the inner panel and gave the rusty area a shot with Fluid Film from an aerosol can. Problem solved for about 4 years now.

The great thing about Fluid Film is no special surface prep. Spray it over existing rust and you are done. Vehicles in road salt and chemical brine areas should be sprayed every year. The chemical brine is way more corrosive than road salt.

Re: Preventing Rust in Fender Wells [Re: Oldtom] #4715013
04/03/18 10:32 AM
04/03/18 10:32 AM
Joined: Jul 2012
Posts: 389
Michigan
khittner Offline
khittner  Offline
Joined: Jul 2012
Posts: 389
Michigan
Since you're in Canada, go get your truck sprayed at a good Krown shop. The shop I go to, Krown Sarnia, removes the taillight fixtures on my truck (a '95 Dodge Dakota) and get their long spray wand back to the wheel well area. It's the oil inside the fender, sprayed between the inner and outer fender panels, and that leaks out for a week or so thereafter (and creeps into crevices long after that), that's keeping my truck rust-free here in Saltbelt Michigan. I can't buy much bodywork and paint for the cost of my Krown resprays.

Last edited by khittner; 04/03/18 10:39 AM.
Re: Preventing Rust in Fender Wells [Re: khittner] #4715044
04/03/18 11:04 AM
04/03/18 11:04 AM
Joined: Sep 2015
Posts: 3,886
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,886
Connecticut
I've driven my 2 Lincolns ('97 and '02) in 17 winters so far. And not a single bit of rust in the wheel wheels or quarters/fenders. Ford did something good with how they under-coated these wells and painted the cars. Very durable. And no rust ever developed into the wheel lips or lower quarters. I hope they're making them as durable today.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Preventing Rust in Fender Wells [Re: Snagglefoot] #4715052
04/03/18 11:08 AM
04/03/18 11:08 AM
Joined: Jun 2006
Posts: 5,034
Great White North.. eh
webfors Offline
webfors  Offline
Joined: Jun 2006
Posts: 5,034
Great White North.. eh
Rust proofing spray is only as good as the level of contact with metal. Often you will find dirt/mud/buildup inside the wheel wells where the rust typically starts. Be sure to brush away this buildup before applying the rust control fluid.

This "mud" is the main cause of rust, IMO, since it traps moisture for extended periods of time. Whereas dirt/mud free metal would not be exposed to those extended periods of oxidation.

Step 1: clean the dirt/mud away from the seams/lips
Step 2: allow the area to dry
Step 3: apply rust control fluid

I did that with my old subaru, which was famous for rusts in those spots, and never had any corrosion issues.


17 Cadillac ATS 2.0T, Edge D1G2 5w30, XG10575
17 Dodge GC, VWB 5w20, Fram DL11665
15 DL650, Rotella T6 5w40, KN-138
Small engines; RT5 10w30
Re: Preventing Rust in Fender Wells [Re: Snagglefoot] #4715075
04/03/18 11:35 AM
04/03/18 11:35 AM
Joined: Dec 2017
Posts: 2,503
SE British Columbia, Canada
Snagglefoot Offline OP
Snagglefoot  Offline OP
Joined: Dec 2017
Posts: 2,503
SE British Columbia, Canada
Anyone try any of the spray can undercoatings on the inside lip of the fenderwell?


If you want the job done right......do it yourself.
Re: Preventing Rust in Fender Wells [Re: Snagglefoot] #4715076
04/03/18 11:37 AM
04/03/18 11:37 AM
Joined: Mar 2018
Posts: 61
Missouri
Oily_Thing Offline
Oily_Thing  Offline
Joined: Mar 2018
Posts: 61
Missouri
Chevrolet/GMC pickups have been rusting badly above the rear wheel wells and at the rear lower cab corners for 40 years. You would think they would figure out a fix by now.


2013 Cadillac XTS4 3.6
2015 Dodge Durango Limited 3.6
2011 Kawasaki Vulcan Voyager 1700
Re: Preventing Rust in Fender Wells [Re: Snagglefoot] #4715087
04/03/18 11:45 AM
04/03/18 11:45 AM
Joined: Dec 2017
Posts: 2,503
SE British Columbia, Canada
Snagglefoot Offline OP
Snagglefoot  Offline OP
Joined: Dec 2017
Posts: 2,503
SE British Columbia, Canada
I guess they want you to buy a new truck! LOL


If you want the job done right......do it yourself.
Re: Preventing Rust in Fender Wells [Re: Snagglefoot] #4715101
04/03/18 11:52 AM
04/03/18 11:52 AM
Joined: Oct 2012
Posts: 4,779
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,779
Taiwan
Vegetable oil.

Re: Preventing Rust in Fender Wells [Re: Snagglefoot] #4715120
04/03/18 12:09 PM
04/03/18 12:09 PM
Joined: Feb 2011
Posts: 6,725
Hudson, NH
LeakySeals Offline
LeakySeals  Offline
Joined: Feb 2011
Posts: 6,725
Hudson, NH
No more sticky slippery waxes that attract soot, sand, flake off. What a mess, dangerous too. I was underneath putting a jack stand in place and I could see the jack slipping off the frame. That was it for me. I switched to a combo of corroseal and Rustoleum rust reformer spray with tannic (the white bottle). So far, so good. Even if it eventually flakes off at 2 years, thats still so much better than FF


06 Escalade 6.0L LQ9 AWD 165k M1 5w30
03 Maxima 3.5L POS 152k ST HM 10w30
Re: Preventing Rust in Fender Wells [Re: Snagglefoot] #4715128
04/03/18 12:19 PM
04/03/18 12:19 PM
Joined: Sep 2015
Posts: 3,886
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,886
Connecticut
I spent 4 hours last summer under my daily driver wire brushing small areas of surface rust on the undercarriage. Applied some Eastwood Corroless primer that I've had around for yrs. Almost all of it precautionary before white flaky stuff turns to brown/reddish stuff. The car will probably fall apart before rust ever is an issue. First daily driver I've ever been this anal on as far as preserving the paint and undercarriage.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Preventing Rust in Fender Wells [Re: Snagglefoot] #4715155
04/03/18 12:47 PM
04/03/18 12:47 PM
Joined: Sep 2010
Posts: 7,485
S California
OneEyeJack Offline
OneEyeJack  Offline
Joined: Sep 2010
Posts: 7,485
S California
Move to Phoenix?

Re: Preventing Rust in Fender Wells [Re: khittner] #4715255
04/03/18 02:39 PM
04/03/18 02:39 PM
Joined: Aug 2009
Posts: 3,277
Ohio
Tdbo Online content
Tdbo  Online Content
Joined: Aug 2009
Posts: 3,277
Ohio
Originally Posted By: khittner
Since you're in Canada, go get your truck sprayed at a good Krown shop. The shop I go to, Krown Sarnia, removes the taillight fixtures on my truck (a '95 Dodge Dakota) and get their long spray wand back to the wheel well area. It's the oil inside the fender, sprayed between the inner and outer fender panels, and that leaks out for a week or so thereafter (and creeps into crevices long after that), that's keeping my truck rust-free here in Saltbelt Michigan. I can't buy much bodywork and paint for the cost of my Krown resprays.


+1.


2012 Honda Accord LX-P 94K
2008 Ford Mustang Pony Package Convertible 17K
2006 Honda Odyssey EX-L 76K
2003 Ford Ranger 3.0 Supercab 111K
Re: Preventing Rust in Fender Wells [Re: Oily_Thing] #4715308
04/03/18 03:39 PM
04/03/18 03:39 PM
Joined: Jul 2008
Posts: 1,095
British Columbia, Canada
ecotourist Offline
ecotourist  Offline
Joined: Jul 2008
Posts: 1,095
British Columbia, Canada
What surprises me is that owners (of all sorts of vehicles) don't wash the inner side of the rear quarter panel, that part you can get at from inside the rear wheel well. Mud collects up there and if it never gets washed off, it just stays there, often damp and in contact with the sheet-metal. I can't think of a better way to make rust. Well yes I can, if you add a bit a of salt to it that would make it even better.

Check almost any vehicle. Curl your fingers around the lip above the rear wheels. They'll come back dirty. My BMW has practically eliminated that space but almost every other vehicle I've ever owned has a shelf up there that seems like it was designed to collect dirt.

I wash that area every time I wash a car (it's the last job before dumping the pail). And it's always dirty.

That's the first spot you see rusting on trucks especially - they have a wide dirt collection shelf right there.


2000 BMW 528i 5MT
2007 Honda Accord EX-L 4Door V6 6MT
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