Good stuff! You may want to investigate the use of a medium/dark grey wash for the models to help delineate the armor pads. If you have a steady hand, painting the wash into the recesses will help them pop a bit. Alternately you can also just give the whole white section a wash as part of the early painting process, then 'clean up' the plates with the white.That said, good stuff! I always liked the White Scars.
Thanks, I tried that in the attack bike (previous HH post) and I totally fucked up the model with Nuln oil, not taking anymore chances with the rest.