Dealing with Panzer grey

I use a mix of techniques. Start by painting a "primer" coat of Flat Black. Next basecoat at varied thin coats of ModelMaster enamel "Panzer Schwarzgrau". Mix up 50-50 lightened basecoat using Flat Light Gray (sorry, I'm at work and don't recall the FS #) and spray that very lightly to the areas I want to highlight. Come back and drybrush the original basecoat to blend/vary color, then weather with washes and other normal techniques, followed be a drybrush of the lightened color. I've never tried Mig's weathered gray although I do have it on hand.

Here's an example of what that finish achieves:

HTH.