The STD has been rapidly increasing in numbers after Badgro got his bike back. The first thing he did was to crusade into the Molestus sector in an attempt to find the Black Templar who originally stole his bike. The crusade proved successfull. Hepa Titus, the templar who stole the bike among others was found and captured. The already corrupt marines succumbed to the gifts of Nurgle with ease, seeing the other option was to examine Badgros bike closely in an unhealthy manner. Some more decayed than others, the Plague Marines make the bulk of the warband. Usually months or even weeks are enough for Father Nurgle to bestow his gifts upon the new recruits, leaving them rotting, battle hungry carcasses immune to pain.
Took about 6 hours if you don't count the drying time of the dip. Most of the armys Troops choices are starting to be painted. A mixture of Citadel Crapcast Plague Marines, kitbashed Loyalists and basic Chaos Marines make a nice looking bunch with lots of variation.