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Motorized Bicycle Welding, Fabrication and Painting - The Chop Shop Custom fabrication and projects, tanks, frames and more.

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  #1  
Old 11-11-2013, 05:31 PM
Darth Yoda Darth Yoda is offline
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Default Cant get the old primer off

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?
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Old 11-11-2013, 08:08 PM
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tooljunkie tooljunkie is offline
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Default Re: Cant get the old primer off

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.
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Old 11-11-2013, 08:11 PM
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maniac57 maniac57 is offline
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Default Re: Cant get the old primer off

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.
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Old 11-11-2013, 08:33 PM
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Venice Motor Bikes Venice Motor Bikes is offline
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Default Re: Cant get the old primer off

Sand blasting is only about $20.
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Old 11-11-2013, 09:02 PM
Darth Yoda Darth Yoda is offline
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Default Re: Cant get the old primer off

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?
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Old 11-11-2013, 09:22 PM
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2door 2door is offline
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Default Re: Cant get the old primer off

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
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Old 11-11-2013, 10:10 PM
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maniac57 maniac57 is offline
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Default Re: Cant get the old primer off

As usual, 2door is right.
You can also spot prime the raw areas if you don't want to strip it again...
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Old 12-04-2013, 03:58 AM
nehaali nehaali is offline
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Default Re: Cant get the old primer off

thanks for sharing such beautiful information
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Last edited by nehaali; 12-04-2013 at 04:08 AM.
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  #9  
Old 12-04-2013, 04:52 AM
Toastyy1990 Toastyy1990 is offline
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Default Re: Cant get the old primer off

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.
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  #10  
Old 12-04-2013, 08:49 AM
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bairdco bairdco is offline
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Default Re: Cant get the old primer off

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.
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