undercoating
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Fleet Mechanic
Joined: Jan 2003
Posts: 1,810
Likes: 15
From: Central Ohio
undercoating
Not really sure what I should do here. My 09 is less than 2 months old. It did not come with any undercoating. To be honest I read many comments suggesting undercoating is bad. I am wondering what can be done to help prolong the life of everything down below. I plan on keeping this rig till it falls apart, so the later that happens the better. I'd love to have everything line-x coated but I figure the cost (if they would even do it) I wouldnt be able to afford right now. Anything else people reccomend? DIY undercoating? Extra frame paint? One of my friends says every oil change he takes the used oil into a spary bottle and sprays the whole underside. Sounds a bit to messy for me.
Cargo Master
Joined: Jan 2008
Posts: 2,219
Likes: 190
From: Colorado Springs
Not really sure what I should do here. My 09 is less than 2 months old. It did not come with any undercoating. To be honest I read many comments suggesting undercoating is bad. I am wondering what can be done to help prolong the life of everything down below. I plan on keeping this rig till it falls apart, so the later that happens the better. I'd love to have everything line-x coated but I figure the cost (if they would even do it) I wouldnt be able to afford right now. Anything else people reccomend? DIY undercoating? Extra frame paint? One of my friends says every oil change he takes the used oil into a spary bottle and sprays the whole underside. Sounds a bit to messy for me.
Senior User
Joined: Dec 2008
Posts: 112
Likes: 0
On my wife's 02 FX4 her doors where the outside door panel wraps under at the bottom, the paint started bubbling after three years and then the rust started. I didn't want to use the used motor oil on a white truck so I spray WD 40 in the door drain holes and let it drain out the other end of the door, it stopped the rust dead. I do this every time I change her oil. I do the same on my F-250. On my truck I used Herculiner and coated the inside of the rear box panels, then recoated everything with spray can undercoat as far up as I could reach and over the wheel wells I put used motor oil. Have some rags ready the used motor oil will drip about a day.
Thread Starter
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Fleet Mechanic
Joined: Jan 2003
Posts: 1,810
Likes: 15
From: Central Ohio
Good ideas. So I guess using used motor oil isnt that unheard of. I kinda though my friend was crazy all these years since I never heard anyone else do it.
Someone suggested I used POR15. Never really heard of that before. Anyone use it? I need to do something... just looked underneath and there is already rust over many things, apparently lots of bolts/rivets were not painted as they are completely covered over with rust already. About a month and a half old and 2,200 miles and she is already rusting.
Any spots particular that need attention? I know on my 99 150 the bottoms of the doors are rusted badly, as well as the cab corners (1 has a 2-3" wide hole), and the bottom of the tailgate. The funny thing is where I scraped the paint off the door in a fender bender still appears to be bare metal years later, as well as about a hundred gouges in the bed through to bare metal have not seemed to rust.
Guess the biggest thing is what is down at the bottom that gets the salt spray. 
Someone suggested I used POR15. Never really heard of that before. Anyone use it? I need to do something... just looked underneath and there is already rust over many things, apparently lots of bolts/rivets were not painted as they are completely covered over with rust already. About a month and a half old and 2,200 miles and she is already rusting.
Any spots particular that need attention? I know on my 99 150 the bottoms of the doors are rusted badly, as well as the cab corners (1 has a 2-3" wide hole), and the bottom of the tailgate. The funny thing is where I scraped the paint off the door in a fender bender still appears to be bare metal years later, as well as about a hundred gouges in the bed through to bare metal have not seemed to rust.
Guess the biggest thing is what is down at the bottom that gets the salt spray.
Post Fiend
Joined: Feb 2008
Posts: 10,977
Likes: 5
From: Lancaster, Pa.
If you want to do it right, from the start and be done with it, POR-15 seem's like the right choice. I'll be doing this soon before the cold weather arrives, I,m keeping my truck too. Check out their link above in the sponsor section and read what it does, i,m sold. Good luck.
Laughing Gas
Joined: May 2006
Posts: 1,192
Likes: 0
From: Oakville, Ontario
What do you guys use to spray used motor oil with? I thought of one of those pump garden sprayer. Would this work?
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Fleet Mechanic
Joined: Jan 2003
Posts: 1,810
Likes: 15
From: Central Ohio
I've never seen it done but my buddy says he uses old spray bottles like for windex. Seems like that would be a lot of work I think one of those pump up garden sprayers would be easier but you'd pretty much have to get one just for that, dont think I want to be spraying the garden after oils been in there lol.
And I'll look further into the POR-15 unless someone wants to suggest something better.
And I'll look further into the POR-15 unless someone wants to suggest something better.
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Posting Guru
Joined: Mar 2007
Posts: 1,191
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I like the Rustoleum silver can... I brush it on, then touch up tight spots with a spray can. Brushing it tends to last longer.
There is a product called "penitrol" it is made by Flood co... Ace hardware has it, and it also is good. The only problenm with penitrol, or oild spray, is it drips on the drive, and in the garage. What a mess it is.
There is a product called "penitrol" it is made by Flood co... Ace hardware has it, and it also is good. The only problenm with penitrol, or oild spray, is it drips on the drive, and in the garage. What a mess it is.
Elder User
Joined: Mar 2007
Posts: 620
Likes: 0
From: Canyon Country
I want to do my inner fenders behind the wheels...anyone have any suggestions? I was thinking of using bedliner in a can... I want something that will stay black for a while, and be easy to keep clean...
Post Fiend
Joined: Feb 2008
Posts: 10,977
Likes: 5
From: Lancaster, Pa.
Sorry fellas, thats Rust-Bullet above in our sponsor section, not POR-15, my mistake. I just noticed at the very botton of all my rear fender wells got spots starting, darn Ford factory mud flaps, they we're lose and they wore some of the factory paint off, shees. Looks like i,m getting it sooner now.
Freshman User
Joined: Jul 2009
Posts: 28
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buddy of mine used this on his motorhome. Stuff work GREAT!
http://solutions.3m.com/wps/portal/3...gl95XCS2Q1PZbl
http://solutions.3m.com/wps/portal/3...gl95XCS2Q1PZbl
Freshman User
Joined: Jul 2009
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Senior User
Joined: May 2003
Posts: 286
Likes: 0
From: Frederick MD & missing AK
I had the dealership spray undercoating under my truck when I bought it. They also did the bedliner, so I assume the stuff is the same. It has held up pretty good so far. I bought the truck in 2005 and no problems yet. I will likely do the same thing with my next truck.
Thread Starter
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Fleet Mechanic
Joined: Jan 2003
Posts: 1,810
Likes: 15
From: Central Ohio
I'll check out some of the others mentioned above. One other thing, do mudlfaps really help? I've heard both sides here, some say they trap moisture around where they mount to the wheel well. I definately want some extra protection and I checked out the duraflaps that folks here reccomend, but looks like its gonna be about $170 just for plain rubber ones, that seems way steep to me for a couple hunks of rubber. Plus I dont really like the look of flaps especially the larger ones. But I want to prolong this trucks life any way I can...