Hi Al I wish you luck ad a speedy solution, oil on a cam belt is pretty deadly and toxic as oil and rubber don't get on ask any Transit owner about the wet belt, yes its a rubber belt that is immersed in oil, and Fords have replaced a shed load of engines under warranty and they still don't get it, its a rubbish idea, problem is oil has a capillary action and flies everywhere especially when being propelled by something thats going at speed.
Steve.