Are you doing this as a job for them or have the Insurance Co asked you to do it.
I would stear well clear of this until you are sure of what you are doing, you could do a lot of work and not get paid for it, as John said there is a lot of work involved in these jobs, having done over 15 years of fire and flood work be sure of what you are getting into.
It may not clean up and will need a redec, then the Loss Adjuster might not pay you, why pay for a clean if they are going to strip the walls in the end.
What are you going to charge? They will want an estimate at least, and a method statement, what process and solutions will you use.
Murky