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  1. #1
    Senior Member Sundance89's Avatar
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    So I had this really cool idea to powder coat my seat post . . .

    annnnd it looks GREAT. (Won't fit back into the frame now but damn it looks good!)

    EEeeyeah.

    Never really considered how thick a powder coat sits on top of metal. Anyhow, I'm thinking perhaps a chemical or something I could just dip it in to thin out the portion going into the frame?? Thoughts?

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    Assuming you don't own a sandblaster, try Aircraft stripper/remover.

  3. #3
    Senior Member Sundance89's Avatar
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    Quote Originally Posted by Purp View Post
    Assuming you don't own a sandblaster, try Aircraft stripper/remover.
    Nope, no sandblaster. Aircraft stripper's at any hardware store, Home Depot? Put it in a glass and let it sit for how much time you think?

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    Your problem is that seatpost frame fits are pretty dam precise. On the order of plus or minus .002". That's less than the thickness of any paint, so you're going to strip back to bare metal or very close to that for the part that fits into the frame.

    If you know the exact height you want the post to be, you might put a hose clamp around the post at that height exactly to protect the paint and get a good line. Then you can sand off the area below using emery cloth strips as if shining shoes. Keep going until you just begin to see bare metal and you should be OK.
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    Senior Member Sundance89's Avatar
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    Quote Originally Posted by FBinNY View Post
    Your problem is that seatpost frame fits are pretty dam precise. On the order of plus or minus .002". That's less than the thickness of any paint, so you're going to strip back to bare metal or very close to that for the part that fits into the frame.

    If you know the exact height you want the post to be, you might put a hose clamp around the post at that height exactly to protect the paint and get a good line. Then you can sand off the area below using emery cloth strips as if shining shoes. Keep going until you just begin to see bare metal and you should be OK.
    For the exact height, I think I'll wait until I get the build done to size it up, then maybe I can salvage what in theory was a pretty cool idea. Oh, and it has a nice clear coat on it too, so I'm gonna to get a little forearm work if I go manual labor.

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    Quote Originally Posted by Sundance89 View Post
    For the exact height, I think I'll wait until I get the build done to size it up, then maybe I can salvage what in theory was a pretty cool idea. Oh, and it has a nice clear coat on it too, so I'm gonna to get a little forearm work if I go manual labor.
    If you start with a medium coarse grit, and work to finer ones, you'll be amazed at how fast it can go. The hose clamp will give you a nice clean line without the need to be very careful.
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    Senior Member jchabalk's Avatar
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    i'm doing something similar right now but with the small round pegs on a decauler.

    It should be relatively simple actually:
    - get a few different sandpapers (medium to fine-grit)
    - cut a strip of the coarsest to be about the size you need
    - put it in the palm of you hand, grit out
    - grip the post with that hand
    - rotate the post with the other hand
    - do that for a while
    - do it for a while longer
    - ... just a little longer

    i'd definitely recommend getting another seatpost and using it to measure the correct height. live with it for a week or so before sanding the paint off your painted one.

    sounds pretty cool, did they paint the top part where the saddle attaches? you might have fit problems there too

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    You are the 3rd guy who i know did it hehehehe good luck with the sanding

  9. #9
    Senior Member Sundance89's Avatar
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    Quote Originally Posted by FBinNY View Post
    If you start with a medium coarse grit, and work to finer ones, you'll be amazed at how fast it can go. The hose clamp will give you a nice clean line without the need to be very careful.

    Quote Originally Posted by jchabalk View Post
    i'm doing something similar right now but with the small round pegs on a decauler.

    It should be relatively simple actually:
    - get a few different sandpapers (medium to fine-grit)
    - cut a strip of the coarsest to be about the size you need
    - put it in the palm of you hand, grit out
    - grip the post with that hand
    - rotate the post with the other hand
    - do that for a while
    - do it for a while longer
    - ... just a little longer

    i'd definitely recommend getting another seatpost and using it to measure the correct height. live with it for a week or so before sanding the paint off your painted one.

    sounds pretty cool, did they paint the top part where the saddle attaches? you might have fit problems there too
    Great tips, thanks to you both. The hose clamp is a winner.

  10. #10
    Senior Member Sundance89's Avatar
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    Quote Originally Posted by ultraman6970 View Post
    You are the 3rd guy who i know did it hehehehe good luck with the sanding
    That's hilarious . . . (and strangely comforting).

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    I would just figure out how much post you want showing and put some tape around it at that point then sand down the powder coat below till it slides in.

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    i used carb cleaner to get pc off my seatpost

  13. #13
    Senior Member Sundance89's Avatar
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    Quote Originally Posted by diaper eater View Post
    i used carb cleaner to get pc off my seatpost
    Appreciate the suggestion.




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  14. #14
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    Buy a new post, hang the pc one on the wall.

  15. #15
    Senior Member Sledbikes's Avatar
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    Quote Originally Posted by Sundance89 View Post
    annnnd it looks GREAT. (Won't fit back into the frame now but damn it looks good!)

    EEeeyeah.

    Never really considered how thick a powder coat sits on top of metal. Anyhow, I'm thinking perhaps a chemical or something I could just dip it in to thin out the portion going into the frame?? Thoughts?
    ahaaaaaaaaaaaaaaaaaaaaaaaaaa
    riding and pimpin again

  16. #16
    TMP
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    Gasket remover seems to work well enough. Just mask off the areas in which you don't want the powdercoat stripped.
    http://www.choppersurplus.com/global...ercoating.html

  17. #17
    <3s bikes Re-Cycle's Avatar
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    What kind of seatpost do you have that's worth all this effort?
    A wild man once explained to me how bicycles came from sailboats.

  18. #18
    Senior Member Sundance89's Avatar
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    Quote Originally Posted by Re-Cycle View Post
    What kind of seatpost do you have that's worth all this effort?
    It's not the seatpost but the build. I'm workin on a smokin hot Xtracycle build and it's definitely worth all the effort. I'll have to pop a pic and post it. (lotta p's there)

  19. #19
    Senior Member Sundance89's Avatar
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    Pics don't do the PC justice. But this is just the beginning of what I'm up to.







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    Does that seat clamp still fit, or will you need a new on of those as well?

  21. #21
    Senior Member Sundance89's Avatar
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    Quote Originally Posted by jimc101 View Post
    Does that seat clamp still fit, or will you need a new on of those as well?
    Yeah, I know. It's close . . . very close. I didn't want to force it. I'll try the gasket remover that TMP recommend on the inside of it to at least get the clamp back to its original inner surface. Then hopefully that will be enough to easily fit over the seat tube. I can always pry the clamp open a little wider too.

    I literally just got my frame back yesterday from the powder coater and unwrapped it. Aside from these minor glitches (er ah, oversights) I couldn't be more pleased.
    Last edited by Sundance89; 04-27-11 at 09:17 PM.

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