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  1. #1
    Senior Member the_don's Avatar
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    Prep work for painting?

    I am thinking about buying this Nagasawa frame (I live in Tokyo and saw this on Yahoo auctions Japan).

    It is a bit battered and looks like it needs a paint job, the seller says there is just one dent in the head tube from the handlebars hitting it, so I would probably just put a small Kashimax TT protecter to hide it. (Is it possible to remove dents in the tubes?)

    Anyway, a friend of mine loves cars and has a complete painting setup in his garage and offered to paint it if I bought it. I found a nice looking Nagasawa decal kit on ebay too!!

    What is the best way to prep the frame for painting?

    Thanks.






  2. #2
    Senior Member Retro Grouch's Avatar
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    I'm a believer in stripping the old paint down to the metal and starting over with new primer. If I were going to have a friend paint it, I'd ask him what kind of prep he recommends.

  3. #3
    Senior Member Grand Bois's Avatar
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    Prepping a bike frame for paint is the same as prepping car parts for paint. Ask your friend.

  4. #4
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    aircraft remover seemed to work pretty well on some parts of my bike...other areas the paint was pretty not responsive.

    I had good luck cutting up pop cans to make little scrapers that I could toss once they lost their edge...plastic scrapers were not strong enough.

    I then hit everything with a wire wheel on a drill...was able to get at all the corners and the wire brush will clear up any rust. For the dent, fill it with some sort of body filler before painting and you won't even have to cover it up.

  5. #5
    Old fart JohnDThompson's Avatar
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    Yes, it is possible to fix dents in frame tubes. If it's just a small dent, fill it with lead solder and file it smooth to match the rest of the tube. After you repaint you'll never known it's there, and since it's filled with metal it won't come out (unlike body putty).

  6. #6
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    Bead blasting followed by phosphoric acid etch is the only way to go if you really want a rust free frame forever.
    Il faut de l'audace, encore de l'audace, toujours de l'audace

    1980 3Rensho-- 1975 Raleigh Sprite 3spd
    1990s Raleigh M20 MTB--2007 Windsor Hour (track)
    1988 Ducati 750 F1

  7. #7
    Senior Member Nessism's Avatar
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    Quote Originally Posted by San Rensho View Post
    Bead blasting followed by phosphoric acid etch is the only way to go if you really want a rust free frame forever.
    Agree, but I recommend sand blasting at low pressure - 45 psi or so. Using paint stripper before blasting will speed up the process if your air compressor is weak (like mine).
    Becareful buying/selling bike parts on-line. I learned the hard way. :(

    Good/Bad Trader Listing

  8. #8
    Senior Member the_don's Avatar
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    I take it I want to remove the headset and the bottom bracket as well then.

    I will ask my friend what equipment he has.  Again, I live in Tokyo and don't have ready access to a lot of equipment. But he has a lot, so I might be over his place to work on it!

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