RansomEli Posted December 4, 2019 Share Posted December 4, 2019 (edited) Need some advice. I'm painting an early 1990's Yamaha motorcycle with plastic fairing and fenders (not fiberglass - they are thick and bendable). It's almost the same stuff you see in 1980's GM bumper fillers/extensions I will prime and then paint using a urethane single-stage color. I know I need to use an adhesion promoter. Questions: Do I use the adhesion promoter under the primer, or after the primer and before the color coat? Is there a particular brand of adhesion promoter that works best? I've heard that DupliColor is better than Bulldog. Any other advice? Thanks in advance. Edited December 4, 2019 by RansomEli (see edit history) Link to comment Share on other sites More sharing options...
Tom M Posted December 4, 2019 Share Posted December 4, 2019 RansomEli, I have used some these products for my restoration. Was very pleased with ease of use and the Tech support I received from Barry the owner Southernpolyurethanes (SPI) Link to comment Share on other sites More sharing options...
RansomEli Posted December 5, 2019 Author Share Posted December 5, 2019 I received the needed info. Clean the plastic surface thoroughly and apply 2 coats of adhesion promoter. You can then apply an epoxy primer or 2K primer surfacer. Link to comment Share on other sites More sharing options...
nickelroadster Posted December 9, 2019 Share Posted December 9, 2019 You might also think about adding a flex agent like they use when repainting bumper covers. Any auto body supply would have it. Link to comment Share on other sites More sharing options...
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