Primer for fiberglass?

[Harp]

My front air dam needs some touch up. Previous owner liked to get too close to curbs. Anyway since I can't afford to have it done professionally right now, I'm going to get a spray can as closely matched as I can to my white paint. Question is what kind of primer do I use to make sure it sticks to fiberglass? Thanks.

[Scott R]

There is more to this than just primer. The problem is that regular rattle can primer can not flex with the fiberglass. You will only get a very short amount of time before it will all flake off. You need primer and paint that contains "flex additive."

[todd951]

Actually, the factory front air dam is urethane, not fiberglass, although what Scott said about needing paint with a flex agent still applies.

[Harp]

Thanks to both of you.