Cheers Guys,
@Protist - The three blacks have varying amounts of Faded Khaki added, I think its something like
#1 = 10%
#2 = 20%
#3 = 40%
The colour shifts are quite subtle when actually painted, so they all look quite similar in the pot - and the Spud is going to be painted with the Colour Out of Space!
Chapter BadgeRight this was bugging me a bit, I knew I wasn't going to freehand all of the chapter badges on these guys, its quite a complex badge and would take ages to do on all of them, and it would be impossible to get them looking anything like uniform.
So it was all about Decals. from what I could find there are two heroes out there who have made sheets that can be downloaded and printed. The first is from Bell of Lost Souls

and these ones from Bolter and Chainsword that are both placed side by side and printed as an A4 Sheet


I had to make some adjustments in Photoshop before printing any of them as they were set up for modern figures and the Griffon faces forward when placed on the Right shoulder pad ( as you look at the figure) and I needed them to face forward when placed on the left shoulder pad. A simple Horizontal flip in PS and problem solved.
It took me a while to decide on what style to use. My initial choice was for the ones from B&C but then I changed my mind and settled on the BoLS ones as I thought they were less heraldic looking. I had a couple of goes with different sizes but when placed over the camo they just looked like black blobs. So I revisited the original Compendium pictures and actually the B&C ones are far closer to the original idea so I changed my mind back again and I'm very happy I did. I also thought that because the B&C Griffons are more spread out they would be less effected by the underlying camo.
here is poor old Brother Test after having a load of different Decals applied and removed. After the decal set I added a small white dot for the eye and then over painted a few bits with my Black #2 to help with the definition a bit
Apologies for the bad quality photo, I couldn't get a close up shot of the shoulder pad that would stay in focus

So I learned a few things about making custom Decals and also learnt that going forward I need to think more closely about where I place the dark spots on the left shoulder pad to avoid them obscuring the outline of the decals - I think the next few applications will look cleaner as I have got my head round what I'm supposed to be doing now.
What do you reckon?