Cant get the old primer off

Discussion in 'Motorized Bicycle Welding, Fabrication and Paintin' started by Darth Yoda, Nov 11, 2013.

  1. Darth Yoda

    Darth Yoda New Member

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    Hi. I got me some color remover which worked real well except for that most of the primer beneath is still sthere. What are my best option? Sandblast it? Sandpaper?
     
  2. tooljunkie

    tooljunkie Member

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    probably just a little scuff with steel wool or scotchbrite will give the stripper something to bite into.
    personally i dont care for using stripper,as cleanup can be troublesome,not cleaning it thoroughly can lead to blemishes in the paint.i have sanded frames to bare metal,it really doesent take all that long.

    must be a good primer if stripper isnt softening it.
     
  3. maniac57

    maniac57 Old, Fat, and still faster than you

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    I agree with tooljunkie. Scuff whats left real good with scotchbrite and paint it. Any primer that hangs on after chemical stripping should make a very good base.
    I don't even strip it unless I have to as decent factory paint is as good as any primer you can apply at home once it's scuffed properly.
     
  4. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    Sand blasting is only about $20. ;)
     
  5. Darth Yoda

    Darth Yoda New Member

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    Yeah, but concerning keeping it as a good base, along the stem where the seatpost is placed it has gone off in some major areas. Would i not do best getting rid of everything that is still there, and on the rest of the frame?
     
  6. 2door

    2door Moderator
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    It isn't unusual for a stripper to need a second application if the first one didn't take everything off. Have you tried reapplying the paint stripper to the areas where the primer is showing?

    Are you sure you're dealing with paint and not powder coat? Some bikes, Nirve is an example, uses paint over a powder coat base. Powder coat can be very difficult to remove. There are special strippers that will cut it but it must be made specifically for removing powder coat. Regular stripper usually won't touch it.

    Tom
     
  7. maniac57

    maniac57 Old, Fat, and still faster than you

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    As usual, 2door is right.
    You can also spot prime the raw areas if you don't want to strip it again...
     
  8. nehaali

    nehaali New Member

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    thanks for sharing such beautiful information
     
    #8 nehaali, Dec 4, 2013
    Last edited: Dec 4, 2013
  9. Toastyy1990

    Toastyy1990 New Member

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    I have used carb cleaner to rub paint off before, you could try that. I think I personally would just add another layer of primer to the whole thing, though.
     
  10. bairdco

    bairdco a guy who makes cool bikes

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    if you're going for the raw steel look, wet sanding the rest of the primer off is the way to go. takes some time but you get a nice shiny steel base.

    if you're going to spray can paint it, just clean it up, primer the bare spots and paint it.

    if you want it to last and have 50-80 bucks laying around, get it powder coated.
     
  11. Darth Yoda

    Darth Yoda New Member

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    How should i clean it? I'm pretty worried that the paint removal has set a bit in the base coat that where left after the paint removal.
     
  12. bairdco

    bairdco a guy who makes cool bikes

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    Old thread. Hopefully, after three years, he got the paint off...
     
  13. MEASURE TWICE

    MEASURE TWICE Active Member

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    I read it over a few times and see that it is not the paint he was worried about removing, but that the metal still would have residue of the paint remover left in the pores of the metal. I suspect he worried that new paint would not go on right with any of the paint remover not gone completely. I would think instructions on cleaning off the paint remover would be indicated on the painter remover instructions.

    Sand blasting if you can do that would be best. I could not get the whole frame in the shops mid size sand blaster. Also some powder coated paint on the engine just does not come off easily with either careful sanding or various goop type paint remover.
     
  14. Springfieldscooter

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    I feel sorry for our future generation .....

    Can you imagine attempting to remove old powder coating?

    Sandblasting old powder coating can be very difficult compared to old enamel or lacquer .
     
  15. bairdco

    bairdco a guy who makes cool bikes

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    One good thing about painting over powdercoat, is after roughing it up, it's a great, rust free primer.
     
  16. alicjanowakxd

    alicjanowakxd New Member

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    I noticed that your knowledge and information are very interesting and useful. I greet you.
     

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