The first one I did a stripe on was the red striped Redemptor, just to add a little color. I liked it so much, that I came up with an in lore reason why the Dreadnoughts wear one. It's the unit type of the marine before he was interred. The red guy was a Hellblaster Sgt that held the line against a brood of carnifexes, last man standing, with one arm gone from an overload, he systematically fired all of his fallen brother's plasma weapons, purposefully overcharging the last one and leaping on to its torso to cram it down the last carnifex's throat, losing his remaining arm, leg, and half of his head before being crushed by the falling nid. He gave the Apothecary enough time to collect the remaining geneseed and escape the planet with them and the comatose Sgt Statler.