engine paint?

I have the silver they say to use as a primer, (fresh batch, used the original batch that came with the "engine painting kit" on a mower deck a few months ago to "use it up") was gonna brush the sheet metal with the silver, and then spray everything with the blue topcoat. This is a pickup truck engine, and not a "show" truck at that... but I have a couple of project cars and I want to do my "experimenting" on this engine so that when I do the engines for my other projects, I get my "screw ups" out on this go round. I just know that the typical parts store or walmart spray bombs do not hold up any more like they used to and whatever I use I want it to at least do "that".