I've been working adding to the White Scars lately, specifically bikers:
I love painting white.
I followed the recipe for espoused by TheApatheticFish here
Pretty standard loadout of Grav-guns, multi-melta and Sergeant with a Combi-Grav.
I need a HQ, of course, in this case a Chapter Master, so I converted one, heavily inspired by this guy, done by Ron Saikowski:
I included the fur collar/cape thing for a feral look and a big honking knife (for cutting the ritual scars, you know)
The hardest part of this model was the epic 'stache. I think I'll call him Chin-Gahtay Khan.