I picked up a can of Adhesion Promoter from Halfords.
The directions say to apply two coats waiting 10-15 minutes between each, then allow to dry for at least one hour before applying primer/lacquer.
When I googled I saw that some adhesion promoters require you to spray within 10 minutes of applying the final coat. However my can does not say this.
I am wondering if it's OK to spray the adhesion promoter and leave it and come back to it the next day to spray, or if it's very important to do it after the indicated time frame, or if it doesn't matter at all.