I recall reading an article on the HOK forum about Bulldog adhesion promoter, with input from the guy who writes the HOK tech sheets.
I believe he suggested that there is a time window to apply the basecoat after the adhesion promoter has been applied, and that the adhesion promoter must be applied VERY THINLY.......and if I remember correctly, he sprays the Bulldog onto the plastic part and actually wipes it off - that's how thin the coat needs to be.
I was led to believe from the article that if the above wasn't done accordingly, that the adhesion promoter would actually be detrimental to adhesion.