i'm doin som painting is two weeks. I heard that some type of platic prep is needed to paint the plastic cover. what kind and and if not, will sanding everything smooth do the trick along with some primer??

oh yeah what is color sanding, what is the best polish ti us to get a mirror shine after i'm through??

 

???anyone???

 

I havn't done this YET but as I understand it, there is a flex agent that should be mixed into the paint to keep it from cracking and there is a special primer just for the plastic parts. I believe it's called 'Bond-aid'. Like I said, I don't have any personal experience with this yet, but it's a place for you to start researching.

 

I prepped my bumper (and whole car) when I brought it to Maaco, so..

I stripped the bumper down to bare urethane with power tools. If your paint is fine, then you just need to scuff-sand the surface with 320 grit, but you probably know that already...

I sprayed the bare urethane with "Flexible Bumper Adhesion Promoter". Then I shot it with "Flexible Bumper Primer". I bought both cans at Pep Boys- I think they were made by Plastikote.

Mixing a flex additive in with the paint for the front bumper might not be worth it- it seems that whenever those bumpers get hit, whether it's a factory paint job (with flex), aftermarket job with flex, or aftermarket job without flex, the paint still cracks.


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
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Yeah, except that without the flex agent the rear aero spoilers on 85-90 firebirds can seriously crack and warp without being hit.

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89 Formula Black / Grey cloth int...305 TBI / 700R4 auto...Borg-Warner 9-bolt 2.77...rear disk brakes...Nitto NT450 tires...K&N Filter...Flowmaster Crossflow...Accel cap/rotor...Accel Supercoil

 

usually the flex primer and bonding agent is enough, but adding it to the paint for a aero spoiler cause I'm sure those flex. But for the bumper covers you shouldn't need it

 

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