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How do i remove Factory Rustproofing from inside of fenders
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beetlecrx
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PostPosted: Sun Feb 13, 2005 7:22 pm    Post subject: How do i remove Factory Rustproofing from inside of fenders Reply with quote

Im doing a restoration on a 74 super beetle, How do i remove the Tar like rustproofing from the inside on fenders,, i dont want it sandblasted as im afraid who ever does it might overheat the metal and warp it ,Will media blasting work, or chemical dip, any info would be appreciated
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RareAir
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PostPosted: Sun Feb 13, 2005 7:36 pm    Post subject: Reply with quote

Several methods: chisel, diesel fuel, carburetor cleaner (in an aerosol can) or Eastwoods undercoating/tar remover spray.
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doubledd
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PostPosted: Tue Feb 15, 2005 5:50 am    Post subject: Undecoating Reply with quote

You may want to try a small can of Klean Strip from Wal-Mart. I haven't tried it on tar or undercoating but my guess it will work. I'm stripping my whole car with it and 4 layers of paint and primer are rolling off *with a little scraping.
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71VOTB
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PostPosted: Tue Feb 15, 2005 8:29 am    Post subject: Reply with quote

VW Trends did an article on this in their 71 Super restoration project. It may still be on the web page somewhere. After trying everything some kind of paint stripper, I think, came out on top.
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marklaken
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PostPosted: Tue Feb 15, 2005 8:41 am    Post subject: Reply with quote

chemicals suck...they are stinky, messy and slow...use a heat gun (or an old hairdryer) and a 2" scraper...sharpen your scraper frequently and try to peel off big chunks...a lot of time, once you get it started a large chunk will just pop off...then just sweep up your mess...it'll take a while and suck, i wouldn't devote a day to this crappy task...just an hour here and there until you are done!...
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75 VW Beetle
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PostPosted: Wed Feb 16, 2005 10:39 am    Post subject: Reply with quote

To clean my fenderwells and floor pans I used a little propane torch and a puttly knife..Very time consuming if your getting ready to have car painted..

This takes most of the undercoating off and then to get rid of the stickey pine sap stuff VW used laquer thinner on a rag.

Watch out for fuel lines, etc when using fire! Shocked
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Grey Ghost
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PostPosted: Wed Feb 16, 2005 2:54 pm    Post subject: Reply with quote

marklaken wrote:
chemicals suck...they are stinky, messy and slow...use a heat gun (or an old hairdryer) and a 2" scraper...sharpen your scraper frequently and try to peel off big chunks...a lot of time, once you get it started a large chunk will just pop off...then just sweep up your mess...it'll take a while and suck, i wouldn't devote a day to this crappy task...just an hour here and there until you are done!...


I second the heat gun method but make sure that you do not get any residue down the heat gun or you will be buying another one. Heat, just as marklaken states, makes that stuff come off in chunks. I did the entire bottom and all the fenders one Saturday afternoon but I gotta tell you, I did not get up Sunday morning.
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nthang
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PostPosted: Wed Feb 16, 2005 9:09 pm    Post subject: Reply with quote

Xylene cuts through bituminous compounds like "tar" very nicely. Its cheap to buy but hazardous as hell to use. Wear chemical gloves and respirator.
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sapper364
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PostPosted: Thu Feb 17, 2005 12:20 pm    Post subject: Reply with quote

I'm doing the very same thing right now, I found using a heat gun, with one of the paint type scrapers, (short, stout, has a small point on one side) works well, run the gun over the entire surface starting from the bottom, once the metal behind the undercoat warms it breaks the hold and you will get nice big pieces to peel off. The light coating will chip away much easier when it cools. But as stated it is time consuming.
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PhatPhenders56
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PostPosted: Thu Feb 17, 2005 12:40 pm    Post subject: Reply with quote

Steam jenny! AKA Steam cleaner.
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Bryce Anderson
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PostPosted: Wed Feb 23, 2005 12:55 am    Post subject: Reply with quote

the fastest way ive found is scraping it COLD with a dull flat blade screwdriver, flakes right off, sweep up the mess. IMHO Ive tried heat and chemicals they just take longer and create a bigger mess.
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not2bright
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PostPosted: Thu Feb 24, 2005 12:45 am    Post subject: Reply with quote

i heard if you take dry ice and cool the tar really cold i just flakes off with a screwdriver
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beetlecrx
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PostPosted: Thu Feb 24, 2005 9:17 pm    Post subject: Reply with quote

i think i,ll use the heat gun method, i tried the Carb cleaner, it worked but made a huge mess, mostly all over me, thanks for the info
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