Nurgle Bike Lords are the bee's knees on the table for CSM and I really wanted one that stood out so I converted up this guy! Haven't played a game of 7th yet, but in 6th he did OK.
I have to say I really like the GW technical paints. On this model I used Typhus Corrosion, Nurgles Rot, and Ryza Rust. I highly recommend these three for Nurgle themed models.
I wanted to make him much bulkier than other bikers so I added the tombstone back support from the WFB Skeletons kit and that pile of trophy heads on the back.
Drilling out the exhausts and the gun barrels is such a simple but effective way to add detail, too.
The pitting on the armor is all done with a rotary tool and a ball mill. More easy and fun details you can add!