Slow coach.
During cruise ship refits we can do 550 dining chairs in a day, that's a three man team, one spraying, two cleaning. Cleaning time per chair is around 1.5 minutes, that's seat pad, backrest and back panel.
Did 1,100 in two days once. Best done either on your knees or sitting on a chair.
That might sound mighty fast and you could think we couldn't possible be doing them properly - no chance, they are done to perfection, but then when you do so many you soon find the most efficient way of doing them.
Simon