Hello Glenn!
There are two kinds of paint that I could heartly recommend for brush painting. One is Citadel paints - after thinning they come down pretty well. Thing with them is the colour selection - they have "fantasy names" like "Sybarite Green" and it's hard to tell if this shade of green would be good for a US WWII vehicle, for example. The second brand is the Revell Aqua Colour - they come in funny looking square plastic containers. Just the looks of those containers can be discouraging, but those are actually excellent brush painting paints. Thin with a little water and in two coats you've got a finish comparable with an airbrush finish. They also stick to plastic so good, that you hardly need a primer coat here.
That would be my two recommendations - good luck with your build and have a nice day
Paweł