This is just a revisit of the spray priming I did last spring when I was undercoating several plastic Warhammer armies at the same time, a fairly massive priming endeavor.
Lots of experimenting and trial and error due to needing an economical alternative to Armory spray primer. Armory as you may know is horribly unreliable even under good outdoor conditions, and I got some of the dreaded texturing/frosting on some of minis. I sprayed.
I tried Krylon Colormaster paint + primer spray and found that it gave a crisp, clean finish nearly identical to what I would get from GW's Chaos Black.
Here are some Skaven miniature photos showing the figures up close to prove that a "paint+primer" product will not obscure detail in the least. I talked to some people at Krylon and they explained that when a primer/paint combo product is made, or if a primer is sold as "2x" coverage, it DOESN'T mean that when you spray it you're going to get coat of primer that's twice as thick as normal.
What it means is that it COVERS twice as well, meaning you can make less passes with the can and get adequate coverage.
I found that when sprayed at proper primer distance of 9-12" it acted and behaved just like a hobby spray primer. That being said, you do of course have to adhere to the usual rules of not spraying too thickly and not being too close.
This product works great but you have be kind of extra-attentive to the fact of how fast it covers or there is the potential to over-spray and begin to obscure detail.
But here's some pics. showing that even the finest details like eyelids, wrinkles in clothing, facial details, and chainmail, etc. are all perfectly picked out: