Paint lots of vehicles fast? For most of us not a problem. Big brush, one colour and slap, slap done. But if we want load of stuff fast and yet want it to look like we spend a year detailing we need a trick or two. You're all grown ups (tuck your shirt in and sit straight) you all do your own thang...but this is what I do and I hope it helps.
Any old acrylic paint you like will do...and never let anyone say you got the wrong shade unless they painted, fought and lived in every vehicle of that type during its life....exigency makes a mockery of uniformity.