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  1. h82crash

    Undercoating. Ugh.

    I've read the accounts, but I don't think a roofing tar based product applied after assembly does much better. After welding up a couple of hundred holes a PO installed and replacing the sill, I did a full degrease, 220 sand, and epoxy primer prior to multiple heavy coats of 2K polyurethane...
  2. h82crash

    Undercoating. Ugh.

    While scraping the softened undercoating with the putty knife, surface looked very even and "coated" with a brown, transparent material. It did not come off scraping any more but I could scratch it with the corner of the putty knife. Today I went over it with mineral spirits and it cut right...
  3. h82crash

    Undercoating. Ugh.

    Nice work. Did you use plastic scrapers to avoid scratching the paint? As some have said, there is paint on the underside, but it was more like over spray than actual paint. Anything that resembled body color paint was softened, I believe, by the solvents in the undercoating.
  4. h82crash

    Undercoating. Ugh.

    I removed the sill already and tried to sandblast the area to prep for the new sill, but the media had no effect on the undercoating except maybe clean the dirt off of it. I wish. I am about 8 hours in and 3/4 done with the floor area. Then will start on the wheel wells. There is still...
  5. h82crash

    Undercoating. Ugh.

    My apologies to everyone. Yesterday I was mindlessly scraping and made a hastey assumption of what I saw. Today I took care to assess what I was looking at while scraping some more. That brown stuff, while coincidentally the same color as the tar film looks to be a coating. It is transparent...
  6. h82crash

    Undercoating. Ugh.

    Thanks, I am truly not trying to argue with you. What I am saying is, mine has no paint under the undercoating. That said, I am still interested in seeing what yours looks like. A film of undercoating is still there but is so thin it is transparent. Bare steel can be seen through the film...
  7. h82crash

    Undercoating. Ugh.

    If the paint is so thin it is invisible, is it protecting anything or even really there?
  8. h82crash

    Undercoating. Ugh.

    It is an asphalt product, even smells like roofing tar. If it were super frozen with dry ice, it might work. But at room temperature it will just put a bunch of dimples in it. Use a plumber's torch, heat small areas about 4x4 inches, keep the torch about 6-8 inches away so it doesn't catch...
  9. h82crash

    Undercoating. Ugh.

    Possibly an anomaly, but there was zero evidence of any kind of paint. Perhaps they just did a phos treatment and called it good. As I believe I mentioned, there is paint in the wheel wells under the tar.
  10. h82crash

    Undercoating. Ugh.

    There is no paint under it on mine. The sill, where it wasn't rusted, had no paint on it either. Maybe mine passed by mistake. The brown is just residue from the undercoating.
  11. h82crash

    Undercoating. Ugh.

    Exactly what I am doing. Time consuming but not hard work.
  12. h82crash

    Undercoating. Ugh.

    Mine was Line-X (receipt from PO) and about 1/8" most places, but 1/4" in some spots. You have to cut it into strips 4 to 6 inches wide with a sharp box cutter. Then get a corner started with a putty knife and pliers and pull. Takes some effort but it comes off.
  13. h82crash

    Undercoating. Ugh.

    It's basically roofing tar. Pretty sure blasting would do nothing but bounce off. I've already blasted the top side of the tub. It would take a lot of heat to warp the tub, there are stiffener ribs pressed all over this thing and the sides have fender wells spot welded to them. I am a little...
  14. h82crash

    Undercoating. Ugh.

    That's what I'm talking about. I don't think it would have left the factory with bare metal underneath. Or maybe it did, but if so, I as a customer would have walked out knowing Toyota short cut their work. Yes, this was clearly applied after the tub was mounted to the frame. But the bare...
  15. h82crash

    Undercoating. Ugh.

    One thing the internet is good for is being an unending source of conflicting information. Undercoating. Is it factory, dealer, PO? I'm removing it now it is bare metal underneath in the center of the bed. The rear wheel wells have paint. Oh, and I thought removing the Line-X from the...
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