You're better off using their primer. I recently thought I would take a short cut to do a 1:18 model using Fusion paint, it turned out to be a disaster that I haven't been able to recover from even yet. I had to go hunt down another model to do the project...fortunately it was before Wally World stopped selling them.

How big of a model are we talking about here? A can of hobby paint such as Tamiya would be hands down better to get your white base laid down.

How do you decant spray paint without creating a cloud.

Bill