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Thread: 1969 Undercoating removal

  1. 02-24-2021, 06:02 AM #1
    987RS60
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    1969 Undercoating removal

    Gentlemen-

    Seeking advice on removal techniques for 1969 S undercoating.

    My car, with many parts date stamped as 03/69, I surmise as an early 69. I may have the build date paperwork, have to dig for that later.

    I have it stripped down for transport to the paint shop, and thought it prudent to remove the existing undercoating since this will be a full and complete restoration, but the existing material on the underbody is unlike anything I have come across. Scraping seems to not be an option (and its not like I have gone soft, I can still keep up with the little German girl on P90X!). Putty knifes are literally useless. 1" wood chisel and hammer- nothing but dents. Rust wheel, wire bursh, etc., zero impact. 10 minutes with a reciprocating tool gives me a quarter size patch of steel and a headache. Goo gone, goof off, gas, acetone, MEK... nothing. Seriously.

    I humbly await any suggestions, and thanks!
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  2. 02-24-2021, 01:05 PM #2
    lopena
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    Perhaps you should look into Dry Ice Blasting.

    Alan
    N.J.
    Alan
    N.J.


    1964 E-Type roadster
    1969 911S
    1988 328GTB
    2002 Maranello
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  3. 02-24-2021, 03:33 PM #3
    Richy
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    You absolutely do not have original undercoating if it is that hard to remove . Dry ice will not work . Try paint remover .
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  4. 02-24-2021, 03:43 PM #4
    bob joyce
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    heat gun and putty knife
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  5. 02-24-2021, 04:51 PM #5
    Fubawu
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    I used a heat gun and chisel, worked well. I also used a multi tool with limited success.
    911 1967S 308470
    [B]911 1965 301946 Irish Green
    [B]911 1965 302962 Polo Red
    911 1965 300760 White SOLD
    911 1971S S/T 2.5
    914-6 1970 GT 2.3
    Look for me at a track near you!
    Early S Reg #2699
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  6. 02-24-2021, 10:07 PM #6
    preS
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    It reads that some one else already stripped it in the past and applied new material. It reads as its good stuff ..

    Richard
    searching for engine (case) 903742
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  7. 02-25-2021, 02:20 AM #7
    flat6guy
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    You could use what my mentor used BUT I’d STRONGLY advise against it as he burned the car and part of his garage down. He used a torch to melt it off. Problem was the owner of the car didn’t show up that night to help and Barry forged ahead. As a result he caught something inside the car on fire and that was the point of no return. Barry was fearless and head strong! This was also told to me 20 plus years ago by his now widow. I can’t remember all the details exactly but that was the just of it.
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  8. 02-25-2021, 05:02 AM #8
    Scott72
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    Heat gun and a scrapper on our 69S. Lots of sweat equity.

    Name: Front Scrapped.JPG Views: 259 Size: 120.9 KB
    69 911S #1379
    65 356 SC #130757
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  9. 02-25-2021, 05:26 AM #9
    gtBen
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    Try a Multi-Purpose Oscillating Tool with a scraping blade together with a heat gun
    Light Yellow -74
    @lagteknik
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  10. 02-25-2021, 10:51 AM #10
    TheTorch
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    why not...leave it alone?

    It sounds like it's well bonded to the metal and doing its job. I was under the understanding it can be painted over.

    Maybe it looks poorly ??
    - 1969 911T Ossi Blue #3981
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