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Topic Review (Newest First)
07-01-2014 02:41 PM
GreenMachine13 I used bed liner in the wheel wells too, after trimming fenders. Also, did the muffler blackout.

I'm wondering what would be best for the diff covers.
07-01-2014 02:25 PM
MatthewDrakeNC 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?
01-02-2012 07:26 PM
razdds2 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.
01-02-2012 07:22 PM
MTH
Quote:
Originally Posted by razdds2 View Post
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.
01-02-2012 07:20 PM
razdds2 Hmm just noticed the one I chose was a rubberized undercoat...that can't be good to spray on certain undercarriage components..
01-02-2012 07:16 PM
MTH
Quote:
Originally Posted by razdds2 View Post
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.
01-02-2012 07:12 PM
razdds2 MTH, are these the right cans?

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

and

http://www.amazon.com/gp/product/B00...=ATVPDKIKX0DER
01-02-2012 06:57 PM
MTH
Quote:
Originally Posted by rthdtj View Post
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.
01-02-2012 06:52 PM
rthdtj 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.
01-02-2012 05:47 PM
razdds2 nevermind, i just saw your post above. so Bedliner for the rusty components, and then high heat paint for the exhaust!
01-02-2012 05:46 PM
razdds2 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?
01-02-2012 05:43 PM
MTH
Quote:
Originally Posted by razdds2 View Post
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.
01-02-2012 04:35 PM
razdds2 how has the rustoleum held up MTH? i'm very well set on getting two cans tomorrow and coating my undercarriage in it.
01-25-2011 11:18 AM
MTH
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.
01-25-2011 10:55 AM
daggo66
Quote:
Originally Posted by MTH View Post
Here's a pic--black muffler.
Did you drop the muffler to do that or just cover the bumper?
01-25-2011 08:59 AM
MTH
Quote:
Originally Posted by NHrubicon View Post
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.
01-25-2011 08:55 AM
NHrubicon 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.
01-25-2011 08:49 AM
MTH Here's a pic--black muffler.
01-24-2011 12:19 PM
LAXADAISICAL616 Thank you, I'll probably give it a try soon
01-24-2011 12:12 PM
MTH
Quote:
Originally Posted by LAXADAISICAL616 View Post
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. 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.
01-24-2011 11:57 AM
LAXADAISICAL616 OK cool thanks for the help. If you spray it over the surface rust anywhere on the undercarriage that's fine?
01-24-2011 11:48 AM
MTH
Quote:
Originally Posted by LAXADAISICAL616 View Post
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.
01-24-2011 11:38 AM
LAXADAISICAL616 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
01-23-2011 08:31 PM
MTH 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.
01-22-2011 02:11 PM
krutj
Quote:
Originally Posted by MTH View Post
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...
01-22-2011 01:51 PM
MTH
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?
01-22-2011 01:36 PM
krutj
Quote:
Originally Posted by MTH View Post
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...
01-22-2011 01:30 PM
MTH 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?
01-22-2011 01:29 PM
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)



01-22-2011 10:28 AM
jkjeeper06 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
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