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Removing undercoating the easy way

Discussion in 'The Hokey Ass Message Board' started by iamflashman, May 3, 2011.

  1. iamflashman
    Joined: May 11, 2007
    Posts: 146


    Harbor Freight has a new tool that made my life MUCH easier.

    They now sell a mini needle scaler.

    I got the idea to use a needle scaler to remove undercoating after using an air hammer one time and allowing it to "slap" the undercoating off of a wheel well and always hoped there was a better tool.

    Then one day I was at HF and saw the mini needle scaler. This thing is an absolute miracle. I removed all undercoating under my fender in less than 1 hour and it does NOT damage the paint underneath.

    Just hold the needle scaler at about a 30 degree angle and work it just like a scraper. Make sure to wear goggles and ear protection as this tool is stinkin loud!

    I uploaded a quick video to flickr of it in action for the disbelievers out there.

    Note the video was done on my cell phone while holding the tool in one hand. The tool works much better with both hands applying pressure but you get the point...

    Here is a pic of the finished product. I know, I know, I should have taken a before but I forgot! I honestly did not expect such awesome results or I would have.

    1957 Ford Ranch Wagon by iamflashman, on Flickr

    Here is the video:
    Last edited: May 3, 2011
  2. Which scaler is this, the $20 or the $45 model ?
  3. iamflashman
    Joined: May 11, 2007
    Posts: 146


    This is the $20 model
  4. cowboy1
    Joined: Feb 14, 2008
    Posts: 914

    from Austin TX

    U Da Man. Thanks for the post! It came at a great time for me.
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  5. iamflashman
    Joined: May 11, 2007
    Posts: 146


    Another note: The trick is to catch the edge of the undercoating. That may be obvious but it is worth stating.
  6. sdbcivic
    Joined: Aug 14, 2008
    Posts: 210

    from West Ga.

    i was at my local harbor freight last week and had one in my hand and didn't get it. oh well i needed an excuse to go back. i think they had it for 12.99 on sale
  7. resqd37Zep
    Joined: Aug 28, 2006
    Posts: 3,217

    from Nor Cal

    Eastwood has a spray on coating that eats the stuff right off. Let it sit for 10 minutes and then scrape it right off. I might try the Harbor Freight thing too though. Thanks for the tip.
  8. iamflashman
    Joined: May 11, 2007
    Posts: 146


    A combo of the two would probably work great. Some of the softer undercoating leaves a residue that I just cleaned off with wax and grease remover but the eastwood stuff may work even better.
  9. How did it work on the softer/gooier stuff, I'm doing the underside of my '62 right now but mine doesn't seem as "dry" as the stuff in your video. I think I'll be heading there this afternoon to pick one of those up anyway, it can't hurt.

    Has anyone ever heard of using oven cleaner ?
  10. iamflashman
    Joined: May 11, 2007
    Posts: 146


    It did work for the gooier stuff as well but not as fast. The front of the fenders around the headlight bucket was 1/2 thick gooey stuff.

    It actually took that off pretty fast but I had to stop every so often and clean the needles. The needles would get stuck together and become less effective.

    I would recommend using this tool "dry" before applying chemicals. The harder the undercoating, the better it works.

    Where I did the gooey stuff, I followed up with wax and grease remover and it clean up the residue.
  11. R Frederick
    Joined: Mar 30, 2009
    Posts: 2,660

    R Frederick
    from illinois

    I used the same thing last December on my firewall and frame rails, it worked great!
    I ended up using their air scraper $20 for the back of my front fenders. I plan on camping out under what's left of the original floor pans with the scaler though.
  12. Truckedup
    Joined: Jul 25, 2006
    Posts: 3,865


    I use this tool,a wife.Also cooks and keeps me warm and happy :D

  13. Pewsplace
    Joined: Feb 10, 2007
    Posts: 2,744


    Great post. I have tried the Eastwood remover and it did not take the undercoating off without a lot of scrapping. I am headed to Harbor Freight!
  14. nickleone
    Joined: Jun 14, 2007
    Posts: 319


    The PRO Rally comunity uses liquid nitrogen. It freezes the undercoat and when you hit it with a hammer or chipper hammer it falls off in big chunks. They have a vessel that is transfered from person to person by freight and they get it filled at a local welding supply.
  15. thaugen
    Joined: Sep 18, 2007
    Posts: 174


    How would this tool work on old Bondo, where yahoo put way too much on?
  16. atomickustom
    Joined: Aug 30, 2005
    Posts: 3,272


    For bondo you want a propane torch and a scraper - heat it up and it'll all fall off in big chunks with just a little prying.

  17. Thats how I do it. No sanding, dust, or bondo boogers.


  18. plywude
    Joined: Nov 3, 2008
    Posts: 700

    Member Emeritus
    from manteca ca

    I've posted this before, so here goes again use KINGSFORD charcol lighter fluid this stuff dissolves under coating, pour it on wipe it off, My wagon was bought new by an apple grower in Napa, Ca from Gasser Motors, kool name, she lived down a dirt road and took the wagon back to the dealer every month or so to have them under coat it again so that she would not have to put up with the dust from her road well after many years of that this crap was 1/2' or thicker on my frame and under the hood a friend told me about Kingsford I asked him if I needed to light a match after puting it on, told me not to do that just soak it down wipe it off, worked like a charm, and it's dirt cheap.........................:D
  19. Very cool!!! Thanks!:cool:
  20. i may just have to pick one up at HF heading there this afternoon.

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