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Removing undercoating crud
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The heat doesn't hurt the paint... but the scraping does! Since your scraping a hardly seen area I wouldn't worry about it, I mean you should repaint ofcourse to prevent rust. I think in order to remove the undercoating your going to have to hurt the paint. On the car I did this to('77 280z), it was to check for rust. I removed it all, wirebrushed the metal, primed it, covered it with cold galvanizing compound, painted it, and then put some more rubberized undercoating on! That was on a car I intended to restore, but never did.... oh and good idea about the fire extinguisher, I shoulda thought of that!
-Rob> I used a scraper and propane torch. Heat it up good, then scrape. No
> matter how you do it, it won't be easy but this is the best way I've
> found. I suggest wearing a respirator when torching!
> -Rob
Not to mention a fire extinguisher, jeez!!
Doesn't the heat from the torch, uh.. mangle the paint?
Thanks for the response!
-Toby
> "T. Reed" wrote:Okay, so I'm sure somebody here has done this - my front crossmember has a
> bunch of black waxy goo on it and I want to remove it all to check for
> additional cracks. I don't want to weld up the ones I know about and then
> find more later on.
>
> So what's the best way to remove this stuff? I tried scraping, I tried a
> couple of chemicals (always use gloves with Castrol Super Clean, by the
> way - chemical burns are NOT FUN!). Scraping with a piece of wood works
> best so far but kind of subtle-y scratches the paint, the scraper edge of
> the wood wears out quickly, and it's labor intensive. There's got to be a
> better way..
>
> Anyone?
>
> -Toby
>
>
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<P>The heat doesn't hurt the paint... but the scraping does! Since your scraping a hardly seen area I wouldn't worry about it, I mean you should repaint ofcourse to prevent rust. I think in order to remove the undercoating your going to have to hurt the paint. On the car I did this to('77 280z), it was to check for rust. I removed it all, wirebrushed the metal, primed it, covered it with cold galvanizing compound, painted it, and then put some more rubberized undercoating on! That was on a car I intended to restore, but never did.... oh and good idea about the fire extinguisher, I shoulda thought of that!
<P>-Rob
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">> I used a scraper and propane torch. Heat it up good, then scrape. No<BR>> matter how you do it, it won't be easy but this is the best way I've<BR>> found. I suggest wearing a respirator when torching!<BR>> -Rob<BR><BR>Not to mention a fire extinguisher, jeez!!<BR>Doesn't the heat from the torch, uh.. mangle the paint?<BR><BR>Thanks for the response!<BR><BR>-Toby<BR><BR>> "T. Reed" <TREED2@U.WASHINGTON.EDU>wrote:Okay, so I'm sure somebody here has done this - my front crossmember has a<BR>> bunch of black waxy goo on it and I want to remove it all to check for<BR>> additional cracks. I don't want to weld up the ones I know about and then<BR>> find more later on.<BR>><BR>> So what's the best way to remove this stuff? I tried scraping, I tried a<BR>> couple of chemicals (always use gloves with Castrol Super Clean, by the<BR>> way - chemical burns are NOT FUN!). Scraping with a piece of wood works<BR>> best so far but kind of subtle-y scratches the paint, the scraper edge of<BR>> the wood wears out quickly, and it's labor intensive. There's got to be a<BR>> better way..<BR>><BR>> Anyone?<BR>><BR>> -Toby<BR>><BR>><BR>> _______________________________________________<BR>> Scirocco-l mailing list<BR>> Scirocco-l@scirocco.org<BR>> http://neubayern.net/mailman/listinfo/scirocco-l<BR>><BR>><BR>> ---------------------------------<BR>> Do you Yahoo!?<BR>> Yahoo! Shopping - Send Flowers for Valentine's Day<BR></BLOCKQUOTE><p><br><hr size=1>Do you Yahoo!?<br>
<a href="http://rd.yahoo.com/O=1/I=brandr/vday03/text/flow/*http://shopping.yahoo.com
/shop?d=browse&id=20146735">Yahoo! Shopping</a> - Send Flowers for Valentine's Day
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