Nobody will be able to give a real good answer because one person's perfect and ready for paint is another person's crooked and bent. Most resto shops will want to see bare metal to see what they're up against, too. I've got some books at home that will show the time for a repaint or panel replacement, but as far as time to get the body ready for paint, that's gonna have to be estimated by the professional looking at it (of which I am niether).