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Old 05-09-2005, 06:13 AM
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Bumper Primer

Would epoxy primer be better for plastic bumpers for minimal chipping
VS the urethane primer that I usually use?
I've used urethane for everything but read that epoxy chips less,
If that's true I would switch for bumpers.
Also I normally sand my urethane bumpers but with epoxy do I
not need to sand it?

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Old 05-09-2005, 03:03 PM
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I think the 2k will be fine JC. I have never used epoxy primer, I intend to on my wife's crappy sport trac paint job where the paint never seems to want to stick and or not spiderweb. She had the roof and hood repainted when it was under warrenty because of those problems. I think an epoxy would work great for those circumstances, as for the bumpers I have never had any problems with 2k working great, even on old bumpers that were really almost dried out too much to continue using. When you lay your clear on, dont use as much catalyst in it, it will make the paint a little softer and keep from having less chips/cracks etc... This is what I read on this site not too long ago when someone was asking about flex additive ( which is a gimmick by the way). Hope this helps.



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Old 05-09-2005, 07:43 PM
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Quote:
Originally Posted by jcclark
Would epoxy primer be better for plastic bumpers for minimal chipping
VS the urethane primer that I usually use?
I've used urethane for everything but read that epoxy chips less,
If that's true I would switch for bumpers.
Also I normally sand my urethane bumpers but with epoxy do I
not need to sand it?
****************************************
Always!
Urethane primers are going to give you a build on a flexible bumper that you really don't want unless needed for a repaired area.
If a 2K is not needed use an epoxy as the adhesion will be better to the bumper and the adhesion of the paint to the epoxy will be much better.
Thats what will stop the stone chips.
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Old 05-09-2005, 08:06 PM
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hey barry, let me throw another one in there...what do think will have better adhesion to the urethane, a 2k with an adhesion promoter or just epoxy. any of those slippery plastics i usually always spray with bulldog first then primer. is it not necessary with epoxy or if i did use epoxy would you recommend the promoter under it as well as the 2k.
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Old 05-09-2005, 08:24 PM
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Epoxy does stick pretty good to properly prepared TPO and TEO.
But sticks even better with adhesion promoter.
I always recommend it be used.
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Old 05-10-2005, 04:58 AM
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Barry, thanks. One more question though.
I have a used bumper to paint a different color for a customer,
Am I doing the right thing by just scuffing real good and painting or
would it be better to epoxy primer it first?
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Old 05-10-2005, 10:17 AM
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Your right just scuff and paint in this case.
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