While waiting for the Heroes of Armageddon drawing to start I painted a quick heavily weathered ultramarine. I still haven't decided whether to go ultras or wolves, but seeing as how I just won an ebay auction for 25 marine bikes, and I just built 5 scout bikes, I might have to go ultras just to use the new loot!
I use test miniatures to try out techniques prior to batch painting. This guy start off as a cleanly shaded marine. A lot of little dabs with a sponge full of paint, followed by weathering powders and I had this result. I play to try out the ash wastes weathering powder on another ultra, since I am not sure the red rust of mars looks right.
I am still trying to come up with good colors for power swords, axes, and lightening claws. Since ultras are blue I do not want to use the same colors as on my BA. Purple or red are my current favorites.