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-   -   Rustoleum Bedliner on Undercarriage (http://www.wranglerforum.com/f274/rustoleum-bedliner-on-undercarriage-76918.html)

MTH 01-22-2011 09:57 AM

Rustoleum Bedliner on Undercarriage
 
Folks,

I picked up some Rustoleum bedliner to patch a few spots I'll be grinding on my light bar. This will take about three sprays and leave me with a near full can of spray on bedliner.

My thought is to spray it on some of the rapidly rusting portions of the undercarriage. It is Rustoleum after all.

Any words of wisdom? Anything I should avoid--for example, will the muffler or the tail pipe get too hot, etc.? Is bedliner just not the product for this?

jkjeeper06 01-22-2011 10:28 AM

I'm about to do my skid plates. I just have to go out and get the cans of it. I'm getting the rustoleum tho. I also want to bed line the inside and the part of the rocker panel that is angled to go behind the steps

krutj 01-22-2011 01:29 PM

I used the same stuff on my rockers and under the tailgate area, for the muffler, I used a high heat paint (it's cheaper)

http://i918.photobucket.com/albums/ad30/krutj/015-4.jpg

http://i918.photobucket.com/albums/a...utj/013-11.jpg

MTH 01-22-2011 01:30 PM

So we're good right? If it's under the Jeep and it's rusting, I can bedline it with Rustoleum? Exhaust, driveshafts, etc., no problem?

krutj 01-22-2011 01:36 PM

Quote:

Originally Posted by MTH (Post 1006883)
So we're good right? If it's under the Jeep and it's rusting, I can bedline it with Rustoleum? Exhaust, driveshafts, etc., no problem?


Sure, it won't hurt anything that was already painted...

MTH 01-22-2011 01:51 PM

Quote:

Originally Posted by krutj
I used the same stuff on my rockers and under the tailgate area, for the muffler, I used a high heat paint (it's cheaper)

Yeah, I'm a little concerned about whether the bedliner will handle the heat on the exhaust parts. It may do fine, I just have no idea one way or the other.

Nice looking Jeep, btw. Are those Mountain Edition pull offs?

krutj 01-22-2011 02:11 PM

Quote:

Originally Posted by MTH (Post 1006925)
Yeah, I'm a little concerned about whether the bedliner will handle the heat on the exhaust parts. It may do fine, I just have no idea one way or the other.

Nice looking Jeep, btw. Are those Mountain Edition pull offs?


Thanks for the compliment..but no, I rattle canned 'em, same with the grill..rustoleum bedliner!!

The wheels are a combo of primer and satin black rattle can...:punk:

MTH 01-23-2011 08:31 PM

I did this today, by the way.

Got a good undercarriage wash at a nearby place, let the Jeep dry, and then put Rustoleum bedliner on everything on the undercarriage showing any rust--driveshafts, skids, differentials, t-case, axle ends, etc. I picked up a can of the "high heat" Rustoleum for the exhaust system parts.

I'll be watching to see how it holds up. Total cost was about $20, and the undercarriage certainly looks a lot better in black--especially that big stock muffler. :D

LAXADAISICAL616 01-24-2011 11:38 AM

Sounds like a great idea, let us know how it works please. Does the Rustoleum leave any noticeable coating? Does it go on evenly and look clean? Thanks

MTH 01-24-2011 11:48 AM

Quote:

Originally Posted by LAXADAISICAL616 (Post 1010769)
Sounds like a great idea, let us know how it works please. Does the Rustoleum leave any noticeable coating? Does it go on evenly and look clean? Thanks

It literally looks flat black. In other words, you know that big silver stock muffler you see protruding from underneath your rear bumper? Mine's black. Looks better, I think. I'll see if I can get a daylight photo tomorrow morning. Per the instructions on the cans, I gave it a few coats, so it looks very even and clean.

LAXADAISICAL616 01-24-2011 11:57 AM

OK cool thanks for the help. If you spray it over the surface rust anywhere on the undercarriage that's fine?

MTH 01-24-2011 12:12 PM

Quote:

Originally Posted by LAXADAISICAL616 (Post 1010828)
OK cool thanks for the help. If you spray it over the surface rust anywhere on the undercarriage that's fine?

That's what I originally asked at the top of the thread, and nobody said otherwise. I'd like to think the folks here would stop me from doing anything really asinine. :redface: As the collective wisdom gave no objections, I gave it a go.

Common sense (admittedly dangerous) tells me it should be fine. All the stuff under your Jeep is routinely exposed to water, salt, dirt, etc., so how bad could a few coats of Rustoleum really be? Why it would be worse than just leaving everything alone, which is presumably safe? Stuff does rust under there, so wouldn't this be at least marginally helpful by slowing (or stopping) that process?

I was slightly concerned about the heat of the exhaust cooking the bedliner off, so I went with the high-heat stuff for those areas. That may have been necessary or may not, I'll probably never know.

My expectation is that it'll do fine, and I'll make it part of my yearly maintainance to toss on a new coat before each winter.

LAXADAISICAL616 01-24-2011 12:19 PM

Thank you, I'll probably give it a try soon

MTH 01-25-2011 08:49 AM

1 Attachment(s)
Here's a pic--black muffler. :D

NHrubicon 01-25-2011 08:55 AM

DON"T spray the bedliner on the exhaust pipes or exhaust system at all...you'll regret it! Use only high heat proof paint if you have to...like stovepipe black.
If you spray bedliner on any heated pipes...it WILL start to cook off, and CAN flake off and start fires in the summer...and the SMELL of it cooking off your pipes and stuff will drive you out of the vehicle...it just is BAD...so please avoid doing that!
We fixed rust holes, patched floor panels, etc. in a cherokee and sprayed bedliner around everything to protect it and prevent further rusting out...and got some on the exhaust and heat deflector by mistake...wheeeeeeooooo! What a stink....so don't do it. And none of it stuck to the heated surfaces-it dried up, flaked or burnt off. Waste of it if you did it deliberately. I know there is paint made to stick to manifolds, get that if you can find it.

MTH 01-25-2011 08:59 AM

Quote:

Originally Posted by NHrubicon (Post 1012639)
DON"T spray the bedliner on the exhaust pipes or exhaust system at all...you'll regret it! Use only high heat proof paint if you have to...like stovepipe black.

Thanks.

This is exactly what I was concerned about and why I DIDN'T do it.

I used Rustoleum bedliner on everything under the Jeep EXCEPT the exhaust parts. On the exhaust parts--including that stock muffler you see in the pic--I used Rustoleum HIGH HEAT PAINT. I'm good to 2000 degrees. ;)

daggo66 01-25-2011 10:55 AM

Quote:

Originally Posted by MTH (Post 1012627)
Here's a pic--black muffler. :D

Did you drop the muffler to do that or just cover the bumper?

MTH 01-25-2011 11:18 AM

Quote:

Originally Posted by daggo66

Did you drop the muffler to do that or just cover the bumper?

Neither. I was just careful so as to not spray the bumper. The spray can gave a pretty narrow spray that was easily controlled.

I was able to get some of the spray up and over the top of the muffler, but I would expect that if I were to drop the muffler, there would be some exposed metal on the top.

razdds2 01-02-2012 04:35 PM

how has the rustoleum held up MTH? i'm very well set on getting two cans tomorrow and coating my undercarriage in it.

MTH 01-02-2012 05:43 PM

Quote:

Originally Posted by razdds2 (Post 1881336)
how has the rustoleum held up MTH? i'm very well set on getting two cans tomorrow and coating my undercarriage in it.

Pretty good. I touched it up once or so a few months ago. I think you should view it as an annual maintenance sort of thing rather than a permanent fix.

Rustoleum also makes another product called "Rust Reformer" that likewise goes on black and seems to spray easier, though I'm not sure it's as sturdy as the bedliner. That's a dedicated product designed for rust, though it may require an extra touch up or two a year. I used both (I had about half a can of each) when I did my touch up, so at this point I've got them both under there.

Just steer clear of hot components. You need high heat paint for that.

razdds2 01-02-2012 05:46 PM

So I can spray the Bedliner on the driveshaft and anything else that normally rusts with no issues?

you said you used high heat version for your exhaust, how did that turn out? is high heat paint a better option for covering the exhaust?

razdds2 01-02-2012 05:47 PM

nevermind, i just saw your post above. so Bedliner for the rusty components, and then high heat paint for the exhaust!

rthdtj 01-02-2012 06:52 PM

No, don't spray your Driveshaft with anything. Your Driveshaft is Balanced and the added weight of the Paint or Undercoat will throw it out of balance.

MTH 01-02-2012 06:57 PM

Quote:

Originally Posted by rthdtj (Post 1881803)
No, don't spray your Driveshaft with anything. Your Driveshaft is Balanced and the added weight of the Paint or Undercoat will throw it out of balance.

I can only speak to my experience, but my driveshaft is painted with spray on bedliner since the day I started this thread and it's been touched up since. No problems.

razdds2 01-02-2012 07:12 PM

MTH, are these the right cans?

Amazon.com: 248657 15oz Rub. Undercoat: acehardwareoutlet

and

http://www.amazon.com/gp/product/B00...=ATVPDKIKX0DER

MTH 01-02-2012 07:16 PM

Quote:

Originally Posted by razdds2 (Post 1881908)

Never seen the undercoating, but it looks like it'll do the job. The high heat paint is correct. This is the bedliner I used and this is the rust reformer. But it's not like they're the only possible products.

razdds2 01-02-2012 07:20 PM

Hmm just noticed the one I chose was a rubberized undercoat...that can't be good to spray on certain undercarriage components..

MTH 01-02-2012 07:22 PM

Quote:

Originally Posted by razdds2 (Post 1881936)
Hmm just noticed the one I chose was a rubberized undercoat...that can't be good to spray on certain undercarriage components..

I have no idea. I wouldn't think it'd be a problem. Keep in mind your undercarriage rides through all sorts of crap. That said, I can say the bedliner, the rust reformer, and the high heat paint works fine.

razdds2 01-02-2012 07:26 PM

The way your muffler turned out looks really sweet, that's why I'm looking to do it also. The original silver underneath looks terrible.

MatthewDrakeNC 07-01-2014 02:25 PM

Yeah, I'm definitely going to under spray like you guys have - the black muffler looks great!!!

Can any one suggest to a "newbie" at under body spraying what NOT to spray??!?!

I'm not completely daft - I wouldn't spray my brake lining - but other than that - what should I stay away from?


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