to be honest any reputable bodyshop would end up going over the whole car again as the end finish would be the reputation, so they would not trust your work nor know of any chance of reaction from the products you may use
i also know what i'm talking about
my advise is to get the bodyshop you want to do the respray to visit you for a quote, as he's there ask him what you can do to keep the price down and he'll also tell you want products to use, this way he knows what you've done
don't worry mate, he wont bite lol

as said before roller primer is for interior decor not cars mate