Multi-select problem: How does the next paragraph end?

A man in overalls appears, showing off several kinds of paint brushes and talking about each of them. He then sands and paints the benches a different color. when he

 (i) is finished, he inches off of the bench and wipes it clean before wiping the board clean with a white towel.; (ii) 's done, he puts a cloth on a wooden bench, removes all of the wet coating, and replaces it with dark paint.; (iii) is finished, he uses the brushes to dry the benches and tells how to put them down.; (iv) is done, he continues to talk to the camera before walking away.;
(iv)