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Old 04-30-2006, 12:05 PM
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OEM Primed Bumper Cover primer/sealer?

I have done a lot of searching here on the forum but just want to get a clear heads-up on this situation ...

I have done some modifications to this new OEM bumper which required the use of adhesion promoter then Duramix then adhesion promoter again.

I then spot primed the areas with a rattle can (1K) primer..and got it flat and smooth

My questions would be....

- Should I sand the 1K primer off and shoot the bumper cover with a 2K primer?
Then seal it?
Which primer will work on flexible bumper covers?


OR

Could I just seal it up with some Prime N' Seal and go to base coat??

I'll post up pictures as soon as I complete

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Old 05-01-2006, 08:27 AM
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The best thing to use on bumpers is epoxy primer.
The next best thing would be a 2K primer, I use it most when
needing to fill scratches. It sands easier than the epoxy but epoxy
can also fill small scratches.
With either one you don't need an additional sealer, the primer is
ready for paint and both of them seal pretty well.
In either case I would remove all the rattle can primer, it's the weak link.
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Old 05-01-2006, 05:40 PM
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awesome thanks for the help!
it will be 70 degrees low humidity on thursday when I plan to base coat...WOO HOO!!
can't wait
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Old 05-02-2006, 05:59 AM
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One more thing, if you cover it with 2k you need to sand it before
basecoating for max adhesion.
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Old 05-03-2006, 06:31 AM
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will do ....I removed all of the rattle can primer and will hit the bumper with adhesion promotor then 2k it....and yes I'll have to block it out a bit so I am not done with the sand paper just yet.....hee hee
wish me luck
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Old 05-04-2006, 08:39 PM
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ok so I screwed it up.....basecoated with chromabase in a low light garage and got some curtains....


I just spent 2 hours sifting thru pages here and it sounds like I am going to have to sand them out and apply 222s midcoat adhesion promotor and shoot again

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Old 05-05-2006, 06:16 AM
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You're probably putting the base on way to wet.
Basecoat is not suppose to be shiney. You have to really
pile it on to get a run. Spray it just wet enough to get it smooth,
it dries fast and is suppose to look dull.
If you sand it to get it flat and don't sand through to the plastic,
you don't need any adhesion promoter.
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Old 05-06-2006, 02:21 PM
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damn I picked up a quart of 222s
anyways...I'll use it when I do the hood and fenders etc.

well I sanded the basecoat and flattened the runs on the side, cleaned it real nice and shot another coat of black....tech sheet on chromabase says it can be re-coated on itself within 24 hrs.... So the bumper is basically smooth and a little orange peeled on top a bit.....I think I'll adjust the fan smaller next time if I re-do it

problem now is I can see a SMALL bit of sanding scratches (probably 200 grit) here and there...... kinda minor but...what is the best way to get them out??

or could I just clear it and spend a day with some 1000 and some water??

I'm learning!!! Thanks Mr.Clark for the help
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Old 05-08-2006, 06:37 AM
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If you clear over scratches chances are you'll still see them,
even after sanding the clear.
Most time the clear enhances scratches.
I would sand the base lightly with a finer grit (I use 600)
to get rid of the scratches then re-base before the clear.
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Old 05-09-2006, 10:59 PM
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should have this ready to buff by friday
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