I’m usually a black-primer guy for all the reasons miniature painters use black primer: hides mistakes, does the easy blacklining, can paint metallics without another layer, etc. But lately I’ve been priming in white because the Marauders are fairly brightly colored, being mostly red and flesh colored. But in the process I’ve discovered that paints that work great over black (like my dark brown and gray paints) look terrible over white.
I use a lot of craft paints for miniatures, because I’m not of the level of painter that really is hampered by the quality issues, but now they are starting to let me down. When the paint looks bad, I get discouraged and stop painting, or at least let it fall by the wayside for a while. So now I have two options–really try to work the cheap craft paints or overcome my frugal nature and invest in some decent paints.
My most likely course of action will be to “power through” the last Chaos Marauders (there’s 11 of them left) with the cheap paints, so they all match. Then, take stock of whatever the next painting project will be, then make the decision.