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Old 11-09-2011, 10:59 PM
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painting plastic fenders and steel tank

Getting ready to paint some plastic honda mtorcycle fenders and a steel tank. I am using ppg dbc basecoat clearcoat and would like to know a good primer for this app. I was gonna just scuff the plastic with scotch brite, its new plastic, and coat the tank and fenders with a suiatable primer. Would an epoxy prime work ok?

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Old 11-09-2011, 11:04 PM
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DPLF with DP 401 catalyst.
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Old 11-14-2011, 02:59 PM
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I'd use an adhesion promoter before epoxy primer.
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Old 11-14-2011, 03:19 PM
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I'll second that* Epoxy on plastic works great. I've always used bulldog adh. promoter first but I'm curious to see what some of the pro's around here typically do with plastic bumpers and fenders.
I've seen a shop prep a bare plastic honda bumper with rubbing alcohol and spray adhesion promoter right before the application of basecoat/cc. Can't say for sure if this is the norm, but I know the guy that owns the car and 2 years later the paint is still adhering perfectly. - this was Sherwin Williams base.


So you guys that work collision. Whatd'ya do???
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Old 11-14-2011, 04:38 PM
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the dplf is what i used to use..expensive stuff..and i used 402 once..by mistake..it all peels off as soon as you spray wash it!!.
I now use bulldog also..never had a problem..
bulldog, then base or bulldog and primer if needed,
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Old 11-14-2011, 07:31 PM
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PPG one choice plastic prep system for raw plastic... #1 scrubber sponge #2 adhesion wipe #3 adhesion spray... that's how I do raw bumpers or mirrors and works great... then your epoxy or what have you... haven't used SPI adhesion spray... ? ?
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Old 11-14-2011, 08:59 PM
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where do you get bulldog? Does a light scotch brite scuffing, bulldog adhesion promoter followed by kustom shop epoxy primer sound like a good plan?
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Old 11-15-2011, 11:57 AM
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I wash mine 1st with a water based wax and grease remover, then use "scuff it" paste with a grey scoth brite pad, wash again with water w&g remover, shoot with ad promoter, thin sealer coat epoxy, base and clear. I use the water based w&g remover from SPI along with the ad promoter from SPI.
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Old 11-15-2011, 07:37 PM
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Quote:
Originally Posted by benchracer1
where do you get bulldog? Does a light scotch brite scuffing, bulldog adhesion promoter followed by kustom shop epoxy primer sound like a good plan?
If it is raw plastic that has never been painted you need to clean the piss out of it. There will still be mold release agents on the surface that need to be removed. Hot water and dawn dish soap, then Rubbing alcohol then w&g remover will do the trick.

you need to really tack the plastic good because there will be a lot of static build on the part. I haven't ever used ks epoxy, but I have used some of their other paints and they are decent quality very forgiving. Read the tech sheet and make sure its a suitable primer for plastic that stays flexible.

After epoxy coat treat it as any other panel just remember that there will still always be more static build with plastics.
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Old 11-15-2011, 09:25 PM
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good call. I did not think of mold release agents. Will definitely clean the thoroughly as described........Steve
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