Apparently they will kick much ass when the new codex comes out. The 'Say ni' ability for one is great.
So anyway, I had a few Grey Knight minis and wanted to use them as painting experiments. For this latest one I got my wet palette wet for the first time. It worked, the paint I was blending for shading (adeptus battle grey to codex grey) did stay wet. It also soaks in a fair bit so you need lots of paint. Plus, dropper bottles would be good, I use GW pots so transferring to the palette makes a mess. I wanted to at least make a vague stab at the NMM method of painting. It came out OK, looks good, although not metallic. More like just realistically shaded grey. I took time to figure out where light would be falling and got it right for the most part. I also took some time on the lettering panels, basing them in Chardon Granite with a dry brush of gold across them before I started the rest of the mini. Pity because you really can't tell. Oh yeah, and Secret Weapon ruined temple base. Seemed appropriate.
I've got a GK termie with psycannon, one with force sword, and another standard, but heresy era, termie that is painted grey. Add those to a death cult assassin and a load of IG stormtroopers that can be Warrior Acolytes. Do I have an army yet? :)