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  1. #1
    Senior Member Journeyman's Avatar
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    May 2004
    South Kansas City.
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    new - old frame and some corrosion

    I have a steel frame on its way to me with some slight rust showing up on the bottom of the frame below the crank and where the calipers fit into the frame. Short of having the frame stripped and repainted whats the best way to get rid of the rust for good? Is there a product/type of paint that could be used to repaint the small paint blemishes? Is there a product that can be used to prevent any rust inside the tubing? Thanks.

    The tallest mountains aren't always the ones you climb with your feet. - Martin Luther.

  2. #2
    Senior Member
    Join Date
    Oct 2005
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    Phosphoric acid metal treatment. Goes under various names. Marine application is called Osphocote, theres a brand you can get at body shops,but the name escapes me.

    You can use it directly on surface rust, but check paint compatability in an inconspicuous spot first. Pick at the loose rust with a sharp object first, then apply.

    Its water thin, so you can use it to flush the insides of all the tubes to rust-proof the bike. Be sure to drill a big hole (app 1/4 inch) in the bottom bracket to act as a drain for the frame.
    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

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