I have acquired a pair of second hand shell cordovan's that have a good bit of polish build up on them. The shoes are attracting dust and are scuffing very easily. I have read Andy's article about the perfect shoe shine. In it, he discourages the use of saddle soap or cleaner on cordovan. What is the preferred method of removing shoe polish build up from shell cordovan shoes? It should be added that the soles are in good shape and not in immediate need of reconditioning. So I would prefer not to send them in to the Alden reconditioning just yet.