I could be wrong but I suspect that not a lot of people here in this forum have done the specifics that you ask about. IE that particular Duplicolor, decanted, further thinned in exact ratio, sprayed to resin through a .3 tip to a small scale resin model.
I've decanted Mr Surfacer 1000 personally but never the Duplicolor Filler Primer. And I decant it for part of the reason you mention, more precise control of the spray pattern. I also use the bottled Mr Primer Surfacer 1000 and thin that about 25% with either lacquer thinner or more likely Mr Leveling thinner. The bottled Mr Primer Surfacer is already fairly thin in the bottle. Well this isn't helping answer your question, perhaps !
That said, a place where Duplicolor paints, including primers, comes up quite a bit is over in the Model Cars Magazine forums. In the General Model Building Questions and Answers sub forum.. You might try there if someone doesn't come along here. Ya, it's a model car forum but they use resin there and Duplicolor from time to time. There are some die hard Duplicolor folks there actually.