Break it down into a timeline. What takes you 3 1/2 hours?
I did my Kill Team this afternoon, 10 models, in about the same length of time, going with something of an assembly line approach.
I sprayed the undercoat the other day, which I haven't included in the time.
After that I work by colour.
Base colour on the models (Necron Abyss). By the time I've done the 10th, I can come back around to the first and start on the next colour. It's darker than I planned to use, and looks almost black under the lighting here, but it's all I had in the paint box (I thought I had Kantor Blue, but meh). It's darker than I intended, but it'll do the job.
Bleached bone on the shoulder pads and helmets. I'm seriously out of practice on painting. Messier than I intended on the first couple, but I can touch up where it's overspilled. On a couple of trophy skulls too.
Red gore on the wings (shoulderpads and team leaders helmet), as well as on the helmet eye pieces and a few scopes and laser dots and such. And on the flayed head attached to the team leaders backpack. Teeth got picked out using the bleached bone in the previous pass.
Boltgun metal. Shoulder pad rims, chainblade teeth, weapon blades. I normally do the entire guns using boltgun metal, I wanted to see how they'd look in legion colours this time around. Thinking I may want to add it to some parts of the weapons to break the overall colour up. Probably to things like armour cables too. Right now, the models are very uniformly dark, for the main.
Lightning blue. First attempt at the Night Lords lightning bolts on the armour. Lightning blue for the corona, then skull white down the middle. I need a thinner brush and steadier hands. Meh, it's not too bad. Tabletop quality :)
Touch up. Necron abyss and red gore where other colours have overspilled.
They're sitting to dry now.
I wouldn't call them my finest work, but given I've painted nothing in the best part of two years, I'll take 'em :)