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Old 11-27-2004, 11:06 AM
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Removing rubber undercoating ??

What's the best way to remove the rubber undercoating ?

I now know why factory spec cars can weigh a lot more than the lowest specified number *lol* ... yup .. we're talking about thick undercoating in some areas.

Now, tried scraping, could work but a pain in the behind

Suggestions ?

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Old 11-27-2004, 11:21 AM
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Vorgath,
I have had good results using a heat gun or propane torch and a paint scraper. Heat the undercoating until the scraper gets to metal and the undercoating comes off fairly easy. If you use a torch be careful to keep moving it, and keep a wet rag handy.
AngliaBob
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Old 11-27-2004, 02:17 PM
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Old 11-27-2004, 08:18 PM
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The previous owner of my '40 Buick had coated the outside of the gas tank with an "undercoating" type stuff. I am not sure what it was, but it did not do a good job at sealing the tank from leaking like he expected. Anyway, my first attempt at removing it was with a grinder and wire brush. That was a 90% failure. I then tried heating it with a torch and scraping it off. (Yes I purged the tank first). That made an even bigger mess . So in a last resort I asked the old guy at the hardware store. He suggested that I try floor adhesive stripper. Specifically the stuff that works on mastic. It worked like a charm. I brushed it on, let it set for a while, scraped it off with a putty knife and wiped it with acetone. Be warned, it will take the paint off too. Good luck.

Kevin
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Old 11-27-2004, 08:31 PM
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Under Coating

Wonder if Aircraft stripper would work? It ate holes in my asphalt driveway.
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Old 11-27-2004, 09:55 PM
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Aircraft Stripper tends to not work on rubber. Asphalt, maybe. I have had the best luck with the heat gun and scraper. Be careful with the open flames that stuff can catch fire pretty quickly.
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Old 11-27-2004, 10:19 PM
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On one of the car shows today, I can't remember which one, they talked about removing that stuff. Don't follow their suggestions. They suggested using a scraper, wire brush, lacquer thinner, and a torch. They never mentioned that the thinner and torch do not mix. I guess we all can watch the papers for someone that believes all that they see on those shows.
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Old 11-28-2004, 12:46 AM
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*R O F L M A O*

hmmmm ok ... floor stripper huh hmmmm

are we talking about the kind of product one would use when removing poly top gloss coating on floors ?
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Old 11-28-2004, 04:16 AM
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Quote:
are we talking about the kind of product one would use when removing poly top gloss coating on floors
The kind that removes adhesive. Check with your local carpet / linoleum store.

Kevin
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Old 11-28-2004, 08:32 AM
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The stuff that I used was Jasco brand "sealer and adhesive remover". It states on the can "removes adhesive and mastic". The gentleman that recommended this stripper to me said that it had to be capable of removing mastic to work on the undercoating. I have no clue if that is true or not, but it worked for me. I purchased a quart of it down at the local building supply (like Lowes or Home Depot). Hope that helps.
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Old 11-28-2004, 12:20 PM
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I removed the undercoat from under my hood with Energine (sp).
Turned hood upside down and wet rags with solvent and scraped. Repeat process. Under car, I used an electrical grinder with a wire wheel. Took a while and was dirty but did the job.
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Old 11-29-2004, 08:03 AM
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Eastwood sells a rubberized undercoating remover. It works pretty good. What I did was sprayed down the full undercarraige of the car with the undercoating remover (wear a respirator, this stuff stinks). Then used a green scrubby and went over everything loosening up the undercoating. It makes a royal mess but works great. I used my pressure washer to clean it all up. That got about 99% of the undercoating off of my car. I then went over every square inch of the undercarraige with wax and greese remover which cleaned everything up nice but may have been overkill.

kev
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Old 12-03-2004, 01:40 AM
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Sandblasting it

here is a project im doing frame up on rotisserie
the only thing i sandblasted were the floors inner, outer ,
firewall ,all door jams and dash. including core support and all hinges, chassis & components .
i did not sandblast the outer body panels .
(WARPAGE) it can be done though . but i wouldn't recomend it unless you are sandblasting cancer spots or something !

Last edited by hoss; 12-03-2004 at 07:26 PM.
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Old 12-03-2004, 05:31 PM
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Undearcoat removal

In new Eastwood mag, there is an advertisement "Mechanical Chassis Undercoat Remover" . I used one just like it that I bought from an auto parts store. Was dirty but worked pretty good. Finished by wiping with paint thinner.
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Old 12-03-2004, 07:30 PM
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somehow i deleted the imade here it is after being sandblasted
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