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I provide a roof inspection prior to quoting the customer. If the roof needs to be replaced I advised customer and thank them for the opportunity. Good business practice.

Yws those can be cleaned. And they will look good if done right. If you have never did cedar, it may be more than you want on the first job. Plan on 3-4 more days than you thought. You can search for the right mix. Some use the same mix they clean roofs with, others use a 3 step process, and others have come up with their own mix. No matter what you do, you will be rinsing a ton.

You should pass the lead to someone in the RCIA.