The primer is done. I decided not to mud the screws, thanks to the crew at Woodturning Resource for the tip. Saved me some work. The primer definitely lightened the room up. I don't have a topcoat planned. It's fine for a shop.
After looking over the trim at Home Depot, I decided to rip 1x6 pine down to approximately 1.5" for the walls and approximately 2.25" for the windows and doors. Saved me some $$, besides the 1x2 and 1x3 at the store are just atrocious, unless you pay for the hardwood.
Now, prime the trim, find and install cabinets, hang shelves. I've found a pretty good deal on unfinished cabinets at Lowe's. I was surprised that the ReStore didn't have kitchen cabinets to speak of.