If you use AIO as a one step the client would NOT be happy with the lack of protection. Better to use cheap carnuba/ploymer spray for cheap jobs. Final Detail by dupont is good for this, but there are many. You do not want a cheap job to look as good as an expensive job. Through the one step philo out, unless your starving and need the money. These jobs lessen your reputation as a serious detailer and people will opt for the cheap job to often. A good detailer has to be a good salesman, sell the 5 step detail, and get paid for it. For every customer who wants the cheapest option there's a customer who wants the best. You just have to find them. If you let me know where you live I might send you ideas, I just have to make sure you don't live close to me. I don't touch a car w/o an agreement of at least $150.