The bathroom was one such situation.
On day one, I removed the old caulk, applied new caulk, and primed the walls with Killz. On day two, I applied two coats of paint on the walls and ceiling and installed the light fixture. Day three was dedicated to adjustment, touch ups, installing the towel bar, toilet paper holder and robe hook, and clean up.
Also, just outside the bath was a matching brass single vanity light with paint smudged on the glass. So we replaced that as well.
All in all I think it turned out nicely.