Undercoating

"hedbutter" (hedbutter) 04/24/2018 at 15:42 • Filed to: None

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Oppo- I recently found a pretty mint 1990 Jeep Comanche that quickly became mine. The Jeep is mostly rust free, and more importantly, the underneath is almost perfect. I’d like to get it undercoated , but was wondering if this is an easier DIY job(no lift, limited garage space)or pay someone. Pic below of it getting it’s new exhaust installed and another of the undercarriage.

Wacko > hedbutter 04/24/2018 at 15:51

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wow, as a Canadian I think i can honestly say I never saw one of these without rust, even when new.

OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars > hedbutter 04/24/2018 at 15:53

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David Tracy is going to find you... and he is going to kill you for that Joop.

Nick- Professional Car Destroyer > hedbutter 04/24/2018 at 15:56

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POR15, roll it on, you can do it on the ground as well.

Basically if the jeep rusts underneath that you will be able to last forever, I know a guy who used it on a tracker and he did it post cancer and the thing was made entirely of POR15, and still is running and driving perfect as he needs it.

MasterMario - Keeper of the V8s > hedbutter 04/24/2018 at 15:57

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Having someone else do it like Ziebart’s is going to cost ~$500 (at least that’s what I was quoted last year) and is the easiest route.

The DIY method I’ve heard of a few people doing is using POR-15 to coat everything underneath. It’s a bit of a messy job though from what I hear.

benjrblant > hedbutter 04/24/2018 at 16:04

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I wrote something about undercoatings a few months ago:

https://oppositelock.kinja.com/rust-proofing-1821186422

Essentially, if you’re willing to DIY and buy a few cans of Krown or Fluid Film and pull some components, you can do a very thorough coating that could very well be better than what most shops would do. You’d have to take care and pay attention to what you’re doing. Be sure to get those key areas where most vehicles rust out.

RamblinRover Luxury-Yacht > MasterMario - Keeper of the V8s 04/24/2018 at 16:09

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As good as POR-15 is for a lot of things, I seem to recall it’s not UV-stable, so you’d kind of need to topcoat it with something.

Jake - Has Bad Luck So You Don't Have To > hedbutter 04/24/2018 at 16:12

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I don’t have anything useful to add here but that is a gorgeous truck. I didn’t even know they made toppers for them.

E92M3 > hedbutter 04/24/2018 at 16:13

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Man that is clean! Doesn’t look like it’s ever been a winter vehicle.

hedbutter > E92M3 04/24/2018 at 16:38

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Thanks! I got it from the original owner, has 124k miles and runs extremely well. It passed inspection no problem but did just find a leaky headliner (which is common). I know it’s always been garage kept.

hedbutter > OpposResidentLexusGuy - USE20, XF20, XU30 and Press Cars 04/24/2018 at 16:39

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I don’t think there’s enough rust for him, hahaha. But I’d definitely sell it for the right price.

hedbutter > Wacko 04/24/2018 at 16:40

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Yeah, I had to spend more than I wanted, but that also got me no literally no rust repair.

hedbutter > Jake - Has Bad Luck So You Don't Have To 04/24/2018 at 16:41

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Thank you! I found it in the right place at the right time and had to get it. And the topper won’t be on it much, but will definitely be nice for camping trips.

hedbutter > benjrblant 04/24/2018 at 16:42

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Thanks for the link! I really don’t want to do the prep, but I also want it done right.

hedbutter > MasterMario - Keeper of the V8s 04/24/2018 at 16:43

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My concerns with paying someone is getting a half assed job. There’s a place near me that does so that I may fall and get a quote. I mostly don’t want to clean/sand it

arl > hedbutter 04/24/2018 at 16:52

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I assume it’s rusted out between the time you took a picture of it and made this post? I jest, I jest.

The underside looks great.

I’ve done a half-ass job with fluid film before. Seems to work pretty well, but it’s not a “set it and forget it” undercoating. You need to re-apply yearly. YMMV.

Duck Duck Grey Duck FTMFW! > RamblinRover Luxury-Yacht 04/24/2018 at 16:54

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You are correct on not being UV stable.

hedbutter > arl 04/24/2018 at 17:03

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It is raining today........

And i dont mind doing it yearly, but was hoping people had experiences paying for it to push me one way or another.

rillweid - Now with more TRD and less TDI > hedbutter 04/24/2018 at 19:25

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I am incredibly jealous.

Frenchlicker > RamblinRover Luxury-Yacht 04/24/2018 at 20:21

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I’ve heard it does pretty well on the underside of Jeeps since they aren’t too exposed. That’s what I’m going to be doing soon myself. Anywhere exposed they offer a specialty top coating.

MasterMario - Keeper of the V8s > RamblinRover Luxury-Yacht 04/24/2018 at 20:32

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I didn’t know that, but maybe being on the underside the exposure is low enough that it doesn’t affect it too much

MasterMario - Keeper of the V8s > hedbutter 04/24/2018 at 20:33

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When I talked to this place it sounded like they do a pretty thorough job even removing fenders to get good coverage, but ymmv

shop-teacher > hedbutter 04/24/2018 at 22:58

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Wow! That thing is clean!

I have no undercoating experience to offer.

Rusty Vandura - www.tinyurl.com/keepoppo > hedbutter 05/16/2018 at 12:31

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Is undercoating a good idea? I’ve heard that doing so can actually promote rust.