Its looking great and yeah i agree with you the 3rd are one of the most experienced companies with fighting the nids, i also think your a great painter too and how did you do the blue power armour?
The blue is painted in 4 layers. First a layer of Ultramarines blue, then you add in some white and paint on another layer leaving about 2-3 mm of the original colour in the bottom of the armout segment. Then add a little bit more white and do the same again. For the last bit you add quite a lot of white and just highlight the edges of the armour. It takes about 2 hours to make the blue on one marine.