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High temp spray paint for exhaust?

Discussion in 'Technical Chat' started by MHARMS, Oct 19, 2017.

  1. Oct 19, 2017 at 7:13 PM
    #1
    MHARMS

    MHARMS [OP] Well-Known Member

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    Thoughts on spray painting exhaust? Is it worth the effort? I spray fluid film on everything else so my exhaust is really the only thing rusting.
     
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  2. Oct 19, 2017 at 7:19 PM
    #2
    panardo

    panardo Active Member

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  3. Oct 19, 2017 at 7:22 PM
    #3
    whalers25

    whalers25 Well-Known Member

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    I've always wondered about this.
     
  4. Oct 19, 2017 at 7:23 PM
    #4
    MHARMS

    MHARMS [OP] Well-Known Member

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    It’s a rust/corrosion preventative film that stays wet until you wash it off. Sprayed it everywhere under the truck giving extra attention to the frame and leaf springs. If you spray it on the exhaust, it will burn off slowly and it’s pretty stinky, but not harmful.
     
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  5. Oct 19, 2017 at 7:24 PM
    #5
    757yotas

    757yotas Well-Known Member

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    ICI Magnum front bumer Rigid LED lighting OME lift 285/70 Nitto Exos 17" Fuel Hostage TRD Exhaust TonnauPro Cover Oil Catch Can Tint Pioneer Nav system Sound System LED lighting Euro headlights Paint
    I do it with rusoleum clear high heat engine paint. Only do clear cuz i have a SS TRD Exhaust that i dont want black lol
     
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  6. Oct 19, 2017 at 7:27 PM
    #6
    hx989

    hx989 Church of @ODNAREM - Pacific Northwest Chapter

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    You can paint your exhaust but I personally would not. Just replace it when the rust eats a hole. Painting it will increase temperature because the painted metal cannot radiate heat out as easily
     
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  7. Oct 19, 2017 at 7:30 PM
    #7
    757yotas

    757yotas Well-Known Member

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    ICI Magnum front bumer Rigid LED lighting OME lift 285/70 Nitto Exos 17" Fuel Hostage TRD Exhaust TonnauPro Cover Oil Catch Can Tint Pioneer Nav system Sound System LED lighting Euro headlights Paint
    Never heard anyone complain of this. Seems like a load of BS to me...engine paint is made more hight heat and engine parts. If it can take header heat im sure a cat back will be fine to.
     
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  8. Oct 19, 2017 at 7:31 PM
    #8
    Toyoland66

    Toyoland66 Well-Known Member

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    That's fine, the heat should be going out the tailpipe not radiating all over your undercarriage.

    VHT makes header paint, that's what I used on the header and exhaust in my FJ40, but it's garaged and I don't put a lot of miles on it so not sure about durability.
     
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  9. Oct 23, 2017 at 9:13 AM
    #9
    stump jumper

    stump jumper Well-Known Member

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    Don't need high temp for tail pipes. I did my tail pipes in regular flat black. I was after appearance not rust protection. I wanted pipes to match tips.
     
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  10. Oct 23, 2017 at 9:22 AM
    #10
    Clearwater Bill

    Clearwater Bill Sometimes when I close my eyes, I can't see.

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    Do you have some infrared readings of painted vs unpainted you can share to demonstrate this?

    Obviously same pre-reading driving conditions and point of reading on the exhaust are required.
     
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  11. Oct 23, 2017 at 9:30 AM
    #11
    zh137dz

    zh137dz Well-Known Member

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  12. Oct 23, 2017 at 9:32 AM
    #12
    zh137dz

    zh137dz Well-Known Member

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    This isn't true, and even if it were possible for rattle can paint to "suffocate" radiant heat this would actually be the preferred outcome in an exhaust situation so the heat is directed outboard and not into the bottom of your truck.
     
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  13. Jan 15, 2020 at 12:49 PM
    #13
    lorsteez

    lorsteez P-Town Resident

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    Thinking about doing this soon. Have some Rust-Oleum high temp black spray paint I can use

    Anyone who’s done this- How’s it holding up after a few years?
     
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  14. Jan 15, 2020 at 1:14 PM
    #14
    MHARMS

    MHARMS [OP] Well-Known Member

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    I ended up doing it a couple years ago. I used VHT high heat. Did everything the manufacturer recommended and it still ended up beginning to peel off about a year later. I honestly wouldn’t try it again, but maybe you’ll have better luck with rustoleum. I’ll post pics today or tomorrow of the current state
     
  15. Jan 15, 2020 at 1:35 PM
    #15
    lorsteez

    lorsteez P-Town Resident

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    Awesome, much appreciated!
     
  16. Jan 15, 2020 at 2:43 PM
    #16
    MHARMS

    MHARMS [OP] Well-Known Member

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    I guess it’s more so wearing off rather than peeling.

    72F01463-3088-4AE2-B56F-AFE0CA2574E5.jpg
     
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  17. Jan 15, 2020 at 2:53 PM
    #17
    badkids

    badkids Well-Known Member

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    thank you man! I just ran out and cut all that exhaust wrapping off my motorcycle. now my pipes can breath!!
     
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  18. Jan 18, 2020 at 2:27 AM
    #18
    Wyoming09

    Wyoming09 Well-Known Member

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    The thermal cycling causes the paint to fail after a period of time.

    I have never seen any last very long .

    If this is something you don`t mind doing every few weeks go for it .

    The stove paint works on stoves because for the most the stove stays hot through the season redo next year before start up.
     
  19. Apr 29, 2020 at 7:12 PM
    #19
    Stormpeacock

    Stormpeacock Well-Known Member

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    Used Rust-Oleum high temp, the 2000F one today..
    We'll see how it holds up!
    IMG_20200429_112813.jpg IMG_20200429_112822.jpg
     
  20. Apr 30, 2020 at 1:37 AM
    #20
    Wyoming09

    Wyoming09 Well-Known Member

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    Looking forward to a progress report in a few months.
     
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