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  1. #1
    apr
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    Advice on painting a steel bike frame

    Hi there,
    I have an old bike frame made by Sun Worksop which I decided to do up as a summer project. The old paint on it was flaking off and there were several patches of rust so I decided to remove the old paint and start again from bare metal. Incidentally, the old paint was not the original, I think it was just grey Hammerite put on by a previous own so nothing special.

    The old paint has nearly all been removed now, so I need to decide what to buy to repaint it with. A friend recommended that I use an acid etch primer to get a more durable coat of paint, looking online I found several brands that make this (Upol, Clostermann, Autotek...) but have no idea which would be best. I also have no idea what brand would be best to use for the topcoat/clearcoat.

    Any tips on which products to go for, or on how best to paint the frame to achieve a decent/durable finish would be greatly appreciated! Also apologies if this is in the wrong forum, I'm new here

    Thanks!

  2. #2
    bike whisperer Kimmo's Avatar
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    If you're using spraycans, you won't get a really durable finish.

    AFAIK, etch primer is only necessary for aluminium; for a steel frame a metal primer is the go.

    I suppose you want an epoxy-based paint to maximise durability. Clear over the top should help.

  3. #3
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    Check out the Rustoleum line at home depot, they have a boatload of new colors. The hammered finish has held up quite well on my steel railings. IDK if clear is gonna help, I thought baked on paint was the most durable, talk to a local body shop.
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  4. #4
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    You can also find some auto paint suppliers that sell two part urethane paint spray cans. It gives you something like a 12 hour or ?? window of time to apply several coats after activation before it cures in the can. I can't remember any specific sites to find this but some googling will probably turn up something. Should provide a much more durable finish than any consumer rattle can paint.

  5. #5
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    Why not get it powder coated?

  6. #6
    bike whisperer Kimmo's Avatar
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    +1 powder coat, unless it's a nice lugged frame (PC's thickness hides detial). It's a bit of a waste of effort if you use spraycans.

    Quote Originally Posted by b1g bleu View Post
    The hammered finish
    Someone once talked me into painting a bike with Hammerite... shouldn't have listened. Hated the finish.

    On the other hand, if you're chasing tiny aero improvements and aren't concerned about the weight, it'll create a boundary layer

  7. #7
    apr
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    I managed to find a 2 part urethane clear coat spray can by a company called spraymax, unfortunately it seems to be MUCH more deadly than normal spray paint so I think I will have to avoid that... I live in the UK btw so can't use home depot for paint supplies. The lugs on the bike are nice (see pictures) so I would prefer not to lose detail by powdercoating.
    WP_000108.jpg
    WP_000109.jpg

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