Nice work Bill.
The grey was called 'Neutral Gray', but I can't remember the FS number.
For fading OD, I normally start off with a slightly faded overall coat, using 50% Humbrol No.30 Dark Green (or No.163, the satin version, which has more 'depth'), and 50% No.29 Dark Earth. Panel edges and areas in shade get a mix of Dark green with 25-30% Dark Earth added. The lighter shades are mixed with a tiny touch of white into the green then add yellow and Dark Earth to lighten as required.
Here's a pic of my B26 done this way - and yes, she really was that badly weathered!