best way to remove undercoating
#109626
08/24/08 12:32 PM
08/24/08 12:32 PM
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Joined: Jul 2005
Posts: 610
Hamilton, Ont, Canada
Dart_it_All
OP
mopar
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OP
mopar
Joined: Jul 2005
Posts: 610
Hamilton, Ont, Canada
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What is the best way to remove the factory under coating from a fender?
I am doing this at home,(can not make to much of a mess) I do not have acess to a sandblaster. My body guy said not to use a torch or I will run the risk of warping the fender.
Father of
1969 Dart Custom, 318 4bbl, 904, 8 1/4 rear soon to be a 340
1967 Barracuda, 273 Commando, 4bbl, 904, 7 1/4 rear Project car
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Re: best way to remove undercoating
[Re: Dart_it_All]
#109627
08/24/08 12:34 PM
08/24/08 12:34 PM
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Joined: Nov 2005
Posts: 15,119
85086
moparpollack
Lil Herman
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Lil Herman
Joined: Nov 2005
Posts: 15,119
85086
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PM Challenger1 he's the man at removing undercoating via some kind of pressure/steam cleaner.
56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
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Re: best way to remove undercoating
[Re: Dart_it_All]
#109628
08/24/08 12:46 PM
08/24/08 12:46 PM
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Joined: Jan 2003
Posts: 1,043
Slidell, La.
doctor_mopar
super stock
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super stock
Joined: Jan 2003
Posts: 1,043
Slidell, La.
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Mineral spirits may soften , and clean it off.
------------------------ It doesn't matter what you do.........As long as you look good doing it !
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Re: best way to remove undercoating
[Re: moparpollack]
#109629
08/24/08 12:50 PM
08/24/08 12:50 PM
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Joined: Jul 2003
Posts: 2,344
Cincinnati, OH
6T6Cuda
top fuel
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top fuel
Joined: Jul 2003
Posts: 2,344
Cincinnati, OH
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Quote:
PM Challenger1 he's the man at removing undercoating via some kind of pressure/steam cleaner.
NO QUESTION!
I got the steam clean treatment, about 2 hours and it is all gone...
I would think it has to be on a rotisserie to do it; that steam cumming back down on you would be bad
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Re: best way to remove undercoating
[Re: mkdart]
#109631
08/24/08 02:38 PM
08/24/08 02:38 PM
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Joined: Jan 2003
Posts: 4,866
N. of 8mile, S. of heaven
Spike
Go Blue!!
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Go Blue!!
Joined: Jan 2003
Posts: 4,866
N. of 8mile, S. of heaven
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Quote:
Use a propane torch,just be careful.Did my whole car that way. Mike
Propane torch and a putty knife. Heat it up, scrape it off. Clean any residue afterwards with a rag and some mineral spirits.
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Re: best way to remove undercoating
[Re: Dart_it_All]
#109632
08/24/08 03:51 PM
08/24/08 03:51 PM
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Joined: Mar 2007
Posts: 3,285
West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,285
West Coast, USA
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I used an electric heat gun and a scraper, so I wouldn't have open flames...  I heated up about half-foot square areas and scraped it rigt off. Prior to heating it, there was no way it would scrape off. I just took mytime and was careful. My buddy got a nasty rash from the stuff once, so try to stay clean. It's a labor intensive process, but it does come off when heated
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: best way to remove undercoating
[Re: Dart_it_All]
#109633
08/24/08 03:55 PM
08/24/08 03:55 PM
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Joined: Apr 2005
Posts: 1,489
west kentucky
gomangoRTSE
pro stock
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pro stock
Joined: Apr 2005
Posts: 1,489
west kentucky
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I used multiple methods, but I will tell you now for your job, go out and buy a $4.99 can of automotive stripper at Wal-Mart. Spray it on a two to three foot section, let it wrinkle, while its doing that get you some newspaper and a straight edge razor blade and holder, and/or you can also use a small scraper and simply peel it off. It may take a couple of applications and a little time, but its safe, you wont warp the fender and your mess will be minimal. I did the enitre bottom side of my car this way. Ive tried about every way at one time or another except the pressure washer thing. I think that would take some time also, not to mention alot of mess.
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Re: best way to remove undercoating
[Re: Dart_it_All]
#109634
08/24/08 04:01 PM
08/24/08 04:01 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Hello everyone, The best way to remove it is a steam pressure washer along with some gasoline in a pressurized sprayer. But like 6T6Cuda said, either the fender needs to be off the car or completely stripped down on a spit. I can get all the nooks and crannys, spotless. Usally the most feasable way is with a little heat and elbow grease. If you go with heat I recomend using Map Gas in one of those trigger torches. The reason I say map gas is because it gets hotter and I can transfer the heat quickly to the undercoating and scrap it off fast before it transfers much heat the the sheet metal behind it. It just gets the job done faster than using LP gas. You have to be careful. I would be leary of using any kind of solvent to soften it up if I was ever was gonna put a torch anywhere on the car.Hopes this helps you good luck with your car.  Check out this thread from the past. web page 
Last edited by Challenger 1; 08/24/08 04:11 PM.
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Re: best way to remove undercoating
[Re: ONEBADBIRD]
#109637
08/24/08 09:13 PM
08/24/08 09:13 PM
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Joined: Jul 2005
Posts: 610
Hamilton, Ont, Canada
Dart_it_All
OP
mopar
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OP
mopar
Joined: Jul 2005
Posts: 610
Hamilton, Ont, Canada
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The fender is already off
I think I will go with the brake cleaner, and check out the stuff from Wall E Mart.
I know there will be a lot of elbow work to be done.
Father of
1969 Dart Custom, 318 4bbl, 904, 8 1/4 rear soon to be a 340
1967 Barracuda, 273 Commando, 4bbl, 904, 7 1/4 rear Project car
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Re: best way to remove undercoating
[Re: gomangoRTSE]
#109638
08/24/08 09:21 PM
08/24/08 09:21 PM
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Joined: May 2004
Posts: 5,123
Warrenton, VA
RoadRunnerJD
master
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master
Joined: May 2004
Posts: 5,123
Warrenton, VA
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Quote:
I used multiple methods, but I will tell you now for your job, go out and buy a $4.99 can of automotive stripper at Wal-Mart. Spray it on a two to three foot section, let it wrinkle, while its doing that get you some newspaper and a straight edge razor blade and holder, and/or you can also use a small scraper and simply peel it off. It may take a couple of applications and a little time, but its safe, you wont warp the fender and your mess will be minimal. I did the enitre bottom side of my car this way. Ive tried about every way at one time or another except the pressure washer thing. I think that would take some time also, not to mention alot of mess.
I don't think the brake cleaner will put much of a dent in it. I did my inner fenders with paint stripper and an engine gasket scrapper. The undercoating bubbled up and came off nicely. I cleaned it up with lacquer thinner and it looked just like new underneath.
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Re: best way to remove undercoating
[Re: RoadRunnerJD]
#109639
08/25/08 11:08 AM
08/25/08 11:08 AM
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Joined: Jul 2005
Posts: 610
Hamilton, Ont, Canada
Dart_it_All
OP
mopar
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OP
mopar
Joined: Jul 2005
Posts: 610
Hamilton, Ont, Canada
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I am gessing any product that is petrolum base will soften up the undercoating enough to scrape it off.
Father of
1969 Dart Custom, 318 4bbl, 904, 8 1/4 rear soon to be a 340
1967 Barracuda, 273 Commando, 4bbl, 904, 7 1/4 rear Project car
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Re: best way to remove undercoating
[Re: Cudajon]
#109642
08/25/08 01:46 PM
08/25/08 01:46 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Like mkdart and spike says, spent one whole summer getting rid of mine. Tain't a fun job.
If you have a whole car to do, then a steam cleaner is the way to go. I did two different cars completely in one afternoon. I could never spend a whole summer on one project. Pressure washing isn't any dirtier than laying on your back with a scraper in hand.
If anyone is close to Cincy I'd consider doing it for you. 
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