These look great. Looking through your gallery I really like your glow-in-the-dark abomination.
He was just a test to see if it would work. Now I plan on painting all the toxic zombies using the same technique. After that, I will probably do something similar to the prison abomination to get an idea how I want the others to look. I have already planned on painting my normal zombies in 3 phases of decay. Freshly dead (pink), recently dead (pallid) and rotting (greenish browns). Lots more work, but totally worth the effort.