I’ve recently purchased a good number of packs 6mm Napoleonic British from my favorite manufacturer of 6mm miniatures: Baccus
Now I’ve got a bunch of Line Infantry washed, prepped, primed, and ready for painting!
I hate the noxious smell of spray cans, so I prime all my miniatures (be they 28mm, 15mm, or even 6mm) by hand with black acrylic gesso.
This takes quite a bit of time, but I like the absolute control it gives me. I don’t know how many times I had to apply additional spray coats because there were certain portions of the miniatures that the spray didn’t “hit” properly!