Hi Chris,
I´m currently doing a Panzer IV ausf G in an winter scheme, my method for this is really simple.
first, aply a base coat of the color you want;
then, aply the white camo, but in very thin coats in some places let the base coat show through; both using an airbrush;
secondly, drybrush using the base coat on all edges and high points, or wherever you want to weather, try to use some reference for it;
Make a wash and an overall overspray of a color of muddy.
My method is almost the explained by sniper, I suggest you to try and see what works best for you.
Cheers