Oh my he is using an upholstery tool. Dude prespray and use a stair tool. Shyt I use a 15" scrub wand om those things. 30 seconds a side. If they aren't to dirty I just run a hand buffer on them. God bless...help you.
What are you pricing each cubicle side? I had one company had me quote like about 800 panel walls. It was insane, they back out of it after they saw quotes from myself and others.