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Exterior, Bodywork, Paint and Glass Beauty is only 4 coats deep...

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  #1  
Old May 21st, 2013, 07:46 PM
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Default Bumper Paint Primer

I'm going to shoot my bumpers soon since I can't get under my truck just yet (health issues) to fiddle with the mechanics. I'm planning to do Por 15, then white paint, then cover the step areas and the back of the bumper where rocks and gravel hit with bedliner material.

Is that the proper order? Por 15, paint, bedliner? Or should I put another primer like slick sand before the paint?

This will be my first time practicing with a paint gun
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Old May 22nd, 2013, 02:17 AM
donrm donrm is offline
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Default Re: Bumper Paint Primer

I used to have a body shop. If you are painting your bumper,I would primer the bumper let dry, then scuff with a red scotch-brite or 320 -400 grit sandpaper. Wouldn't hurt to put por15 on the back side of the bumper. Good luck. Donrm Cinti. ohio 1966 fleetside 351 e
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Old May 22nd, 2013, 05:48 AM
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Default Re: Bumper Paint Primer

I was planning on using Por 15 as my primer, but I'm reading up on it tonight in a mad information overload and it's looking like consensus is DP90 instead of Por 15 for a bare metal primer. I'm wanting something I can bang with a hammer and it'll be tough, but dang - DP 90 is 60.00 a quart!

Is there gold in it or somethin?

What would you use on the bare metal?
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Old May 22nd, 2013, 06:00 AM
bigblockv6 bigblockv6 is offline
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Default Re: Bumper Paint Primer

The DP primers work real well, that's the price you pay for a professional product. I sealed the entire body on my 68 K-2500 back in 1991 with DP primer, all these years later everything is holding up great. POR 15 is more for rust spots yet it's not so cheap either and I've seen surfaces rust through it.
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Old May 22nd, 2013, 02:00 PM
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Default Re: Bumper Paint Primer

I guess it's worth it. I'll try to hold out for a sale though. That's going to cost me a fortune for two coats of the stuff if I have to do the whole truck.

Does it keep well if I don't use it all? I mean, can I just re-cap it and store it for a few months?
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Old May 23rd, 2013, 03:35 AM
bigblockv6 bigblockv6 is offline
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Default Re: Bumper Paint Primer

The DP primers keep well for months but make sure to keep the can well sealed and do not poor the activated primer in the same container or else it will eventually solidify in short time.
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Old May 23rd, 2013, 06:54 AM
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Default Re: Bumper Paint Primer

I have used Zero Rust with good results so far. SUPRISE bonus is the matte OEM look when dry.
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Old May 24th, 2013, 02:09 PM
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Default Re: Bumper Paint Primer

You can also paint the bed liner material, if you want to color-match those areas. Follow bed liner instructions and wait for it to fully cure before top coating. 3M makes a product called Body Schultz, a rubberized undercoating which is less gravelly than truck bed liner.
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Old May 24th, 2013, 02:13 PM
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Default Re: Bumper Paint Primer

Also, think of DP90 as a sealer, and apply one wet coat. Then use high-build primer on that if you are trying to fill scratches before top coating.
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