This (not unlike a lot of services to auto dealers) is near impossible to "sell" as a change of doing business. I've been around processing companys and looking at warranty from the outside for over a decade now and nearly every case I see is warranty administrator walks out and dealership needs help. Once they are on, some enjoy the service and stay - others don't.
The most successful marketing is by referrals - word of mouth. Dealership has a problem, they call around for help, and are somehow put in touch with you. For instance, we don't do claims processing, but because of who we are and the warranty publications a get a couple of calls from dealers and managers a month. But I can almost guarantee that if I would have called these same dealers a month earlier they wouldn't have had any interest in talking about outside warranty processing.
Just email me if you have questions.
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** Rob, Editor Dealersedge/WD&S **Help is only a message post away!
robc@dealersedge.com