Hi,
I use halfords white car primer, much cheaper than gw spray cans
You could always spray white with a very light coat to keep the detail, paint the black bits black and the red bits red, no need to go OTT with the paint brush just a qick fly over, then all the little gaps where the white shows up just finish the minatures with a good couple of layers of black GW ink. that way you will get grey contrast aswell I always do test stands first, so try these and find a good compromise between finish and painting time anywhere in the middle is good
One thing i will say i have had excellent results with white undercoat and mixed with inks you can make a minature look a 1000 times better, I have only been using inks for about a year and would never go back now to not using them, they are awesome
Also on the primering, if you spray to far away you get two much propellent and less paint and can end up with bobbles/snow flaking, you fairly close and short fast bursts give a good thin coat and a better finish, dont spray when cold though
Regards danny
