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Author
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Topic: under coating??
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67aquamustang
Journeyman Posts: 5
From:
Registered: Oct 2001
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posted 12-25-2001 10:20 PM
   
Any recommendations out there for removing undercoating. I started chipping (literally chipping with a hammer and chisel) away at the stuff and found some spots where rust was forming under the undercoating, so I would like to remove it, and get a coat of POR15 on the rusty areas. The undercoating appears to have done a decent job at preventing rust though given the 34 years it's been there. Was considering reapplying new undercoating after getting the old stuff off and solving the rust issue. Any suggestions! Thanks!!
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Stang28965
Gearhead Posts: 411
From: Webster New York USA
Registered: Mar 2001
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posted 12-25-2001 10:30 PM
Use a torch and a scraper to get it off, works well, Eastwood also has a undercoating removal kit for sale.
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Fastback68
Gearhead Posts: 1746
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 12-26-2001 07:29 AM
EXTREMELY generous amounts of paint stripper works, but when the undercoat gets really thin, you have to wipe it off when soft with a rag, then let it dry and sand.
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mellowyellow
Gearhead Posts: 5739
From: So. Fl.
Registered: Aug 2000
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posted 12-26-2001 07:46 AM
No question that undercoating CAN help to prevent rust, proividing moisture doesn't get underneath as rust can travel laterally. My 68 had undercoating and the previous owner removed it all with scraper and propane torch. He then used the most coarse steel wool in vise grips, after he sprayed mineral spirits on the surface with a 409 type spray. He then sanded the bottom, primed and painted it with 7777 Rustoleum satin black. That was 11 years ago and it still looks good.
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66fstbck
Gearhead Posts: 116
From: Worhtington, Pa. USA
Registered: Feb 2000
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posted 12-26-2001 09:29 AM
I removed all of my undercoating by two methods. One, was the torch/scraper method. And the other, was the big screwdriver/lots of elbow grease method. Of the two, the torch method was easier but, chipping it off with the big screwdriver got it all off better.
Alan------------------
Alan 66 Fastback
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SteveLaRiviere
Administrator Posts: 33988
From: Saco, Maine
Registered: May 99
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posted 12-26-2001 07:30 PM
What really works well for the heavy stuff is an air chisel set on low {~20 psi} air pressure. Then wipe the remainder off with paint stripper or mineral spirits.------------------
'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'97 Probe GTS 2.5L DOHC Merry Christmas!!!
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bazooka67gt
Journeyman Posts: 12
From:
Registered: Dec 2001
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posted 12-27-2001 03:52 PM
Remove undercoating using heat and elbowgrease. Clean and repair under car then paint with Eastwood chassie black. Do not re undercoat; I would not buy a classic car that was undercoated it is used to hide to much stuff. The paint lets you and others see what a nice job you did. Joe
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kcode
Gearhead Posts: 2623
From: alvaton,ky,usa Suburb of Bowling Green, M&M #79, MCA #29208
Registered: Jun 99
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posted 12-27-2001 11:55 PM
I remember years ago, paying a company, Ziebart, to spray all that gooey crap on a car to make it last.  Mike
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mellowyellow
Gearhead Posts: 5739
From: So. Fl.
Registered: Aug 2000
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posted 12-28-2001 12:18 AM
I remember looking at a car in the bone yard that had Ziebart plugs all over where they stuck in the wand-like a reverse liposuction!! Large rust areas, 5" away, a Ziebart plug!!!!! I bought a 67 cv that had Northern roots. It had solid floors and shot inner rockers. The undercoat saved the floors. Still don't like it, though.
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