I need a plastic primer recommendation

[Afazz]

I have some rigid plastic engine bay parts that need painted. Some will be base/clear and some will be single stage urethane. In the past I have used SEM aerosol plastic adhesion promoter with decent results, but what should I be using under real paint? I usually use PPG products if that matters.

[JCCLARK]

I like "Bulldog" adhesion promoter, it comes in either an aerosol can or
by the quart can for putting in a spray gun.
I prefer to use my gun to spray it.
That's for any bare plastic.
After that I always use epoxy primer if I want super good adhesion.
that really makes a difference for items like bumpers in reducing
road rash. Not all epoxies are flexable, I use one by SPI that is.

[spitfire481]

i agree. i use bulldog on all my raw plastic then prime with ppg 3055 (our standard shop primer)

[johnnynumfiv]

I use glasurit 934-70 one step plastic primer. Simply clean with plastic cleaner, apply the 934-70 as the first coat followed by 285 primer coats. I used to use bulldog, but it's not covered under glasurit's warranty.

[Afazz]

I think I will try the Bulldog, thanks everyone!