I've just built this pak40 and crew and I have the figures a coat of humbrol Matt varnish (in a spray can) and they have gone all fuzzy so to speak, with a white powder on them? I shook the can for a good 2-3 mins before using it. And I've not had that problem before with it. I am going to weather them up anyway with washes and highlighting so it doesn't really matter for now. But anyone know why it's done it? Also I'm struggling to decide on a colour scheme for the gun? I know the early ones were german grey? But I wanted to do a camouflage pattern like the later ones.... but don't think I'd be able to achieve a nice finish without using an airbrush? I only use brushes.