The brush on primer mentioned above is white (Vallejo have one). I have been an advocate of black on the 28mm sized figures since the beginning, but the latest round of metallics have been disappointing (note that the silvers work like a bought one). So with all that I am going to give the brush on primer a try.
The challenge will be to ensure that all areas get some sort of paint. Missed areas on a black primed model look like deep shadows. Missed areas on a white primed model really stand out and look, well, shit. The other trick will be in getting the darker "scale" colours and grungy feel you get for free with black undercoats. It will really be a matter of darkening paints accordingly, which will require some work on palette mixing. Cool.
I should that my 15mm work gets a white undercoat followed by a brown shadow wash, so this won't be all new. It will be a challenge but I am sick of fighting with red, white, yellow and the non-silver metallics - so here I go...
