Depends on how bad the condition of the paint is,
the budget, and the expectation of the customer.
I've used OPS with rotary and PC using foam pads and microfiber pads but wound up with a serious case of wheel hop using the rotary and MF pads as expected. Rotary and foam on neglected paint is a winning combination. I especially like to top OPS with the Collinite lineup on darker color cars. Especially those that were not well cared for but were on my maintenance schedule.